by | Sep 27, 2025
TC-5045 A/B Page 1 of 2 Date: 09/08/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5045 A/B
45 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5045 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various types of parts. It is an excellent mold material for casting rigid and flexible
urethane systems. It may also be used as a mold making material for casting low melting metals in continuous operations to
650 F (344 C) and sporadic applications of 850 F (454 C). TC-5045 A/B has proven to be less inhibited in its cure than
standard platinum based silicones. It has a very favorable CTE for heat expandable mandrels used in composite tooling.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240 45 5
Density (g/cc) ASTM D792 1.33
Cubic Inches per Pound N/A 20.5
Color/Appearance Visual Pink/Opaque
Tensile Strength (psi) ASTM D412 756
Elongation (%) ASTM D412 400
Tear Strength (pli) ASTM D624 Die B 96
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
Coefficient of Thermal Expansion (in/in/ F) ASTM831 14.64 x 10
-5
Dielectric Constant, 100 Hz ASTM D150 3.187
Dissipation Factor, 100 Hz ASTM D150 0.0054
Dielectric Constant, 100 kHz ASTM D150 3.139
Dissipation Factor, 100 kHz ASTM D150 0.0014
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 13
Specific Gravity @ 77 F (25 C) 1.38 1.03
Color Tan Red Oxide
Viscosity (cps) @ 77 F (25 C) Brookfield 56,900 900
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 25,500
Work Time, 100g mass @ 77 F (25 C) 45 minutes
Gel Time 60 minutes
Demold Time @ 77 F (25 C) 16 24 hours
Demold Time @ 150 F (65.6 C) 2 4 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5045 A/B Page 2 of 2 Date: 09/08/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
INHIBITION:
Although TC-5045 A/B has proven to be less inhibited in curing against most substrates some materials may cause inhibition or
neutralization of the curing agent. Inhibition may easily be determined by brushing a small quantity of TC-5045 A/B over a
localized area of the surface to be reproduced. If the TC-5045 A/B is gummy or uncured after the curing time, then you know
the mold surface is acting as an inhibitor. Molds made from wood, plaster, metal or plastic should not cause inhibition if they are
clean. To insure against possible problems, it is advisable to spray a RF barrier film (BJB product RF-5215) over any
questionable surfaces. This is the best way of treating clays and surfaces that cause inhibition.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 46
Gallon Kits 8 lbs. 13 oz. 182
5-Gallon Kits 40 lbs. 4 lbs. 902
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,148
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction.
Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek
qualified medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5045 A/B Page 1 of 2 Date: 09/08/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5045 A/B
45 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5045 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various types of parts. It is an excellent mold material for casting rigid and flexible
urethane systems. It may also be used as a mold making material for casting low melting metals in continuous operations to
650 F (344 C) and sporadic applications of 850 F (454 C). TC-5045 A/B has proven to be less inhibited in its cure than
standard platinum based silicones. It has a very favorable CTE for heat expandable mandrels used in composite tooling.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240 45 5
Density (g/cc) ASTM D792 1.33
Cubic Inches per Pound N/A 20.5
Color/Appearance Visual Pink/Opaque
Tensile Strength (psi) ASTM D412 756
Elongation (%) ASTM D412 400
Tear Strength (pli) ASTM D624 Die B 96
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
Coefficient of Thermal Expansion (in/in/ F) ASTM831 14.64 x 10
-5
Dielectric Constant, 100 Hz ASTM D150 3.187
Dissipation Factor, 100 Hz ASTM D150 0.0054
Dielectric Constant, 100 kHz ASTM D150 3.139
Dissipation Factor, 100 kHz ASTM D150 0.0014
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 13
Specific Gravity @ 77 F (25 C) 1.38 1.03
Color Tan Red Oxide
Viscosity (cps) @ 77 F (25 C) Brookfield 56,900 900
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 25,500
Work Time, 100g mass @ 77 F (25 C) 45 minutes
Gel Time 60 minutes
Demold Time @ 77 F (25 C) 16 24 hours
Demold Time @ 150 F (65.6 C) 2 4 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5045 A/B Page 2 of 2 Date: 09/08/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
INHIBITION:
Although TC-5045 A/B has proven to be less inhibited in curing against most substrates some materials may cause inhibition or
neutralization of the curing agent. Inhibition may easily be determined by brushing a small quantity of TC-5045 A/B over a
localized area of the surface to be reproduced. If the TC-5045 A/B is gummy or uncured after the curing time, then you know
the mold surface is acting as an inhibitor. Molds made from wood, plaster, metal or plastic should not cause inhibition if they are
clean. To insure against possible problems, it is advisable to spray a RF barrier film (BJB product RF-5215) over any
questionable surfaces. This is the best way of treating clays and surfaces that cause inhibition.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 46
Gallon Kits 8 lbs. 13 oz. 182
5-Gallon Kits 40 lbs. 4 lbs. 902
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,148
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction.
Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek
qualified medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5041 A/B Page 1 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5041 A/B
40 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5041 A/B is a high tear strength, addition/platinum, room temperature curing silicone rubber designed for mold making,
encapsulation applications, pressure pads, gaskets, and various types of parts. It is also used to make molds for casting low
melting metals. With the use of talc powder as an interface the TC-5041 A/B has been used with cast metal temperatures
running 650 F (344 C). With the ability to withstand high temperatures the TC-5041 A/B works very well as a mask for metal
spraying and welding operations.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 40 5
Density (g/cc) ASTM D 792-00 1.38
Cubic Inches per Pound N/A 21
Color/Appearance Visual Dusty Blue
Tensile Strength (psi) ASTM D 412-98a (2002)e1 740
Elongation (%) ASTM D 412-98a (2002)e1 457
Tear Strength (pli) ASTM D 624-00e1 Die B 175
Coefficient of Thermal Expansion, (in/in/ F) ASTM E831 13.87 x 10
-5
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 14
Specific Gravity @ 77 F (25 C) 1.43 1.04
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 71,000 450
Mixed Viscosity (cps) @77 F (25 C) Brookfield 26,000
Work Time, 100g mass @ 77 F (25 C) 60 minutes
Gel Time 90 minutes
Demold Time @ 77 F (25 C) 6 8 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5041 A/B Page 2 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulphur containing and
organometallic salt containing compounds such as organic rubbers and many condensation cured RTV silicone rubbers.
Inhibition may easily be determined by brushing a small quantity of TC-5041 over a localized area of the surface to be
reproduced. If the TC-5041 is gummy or uncured after the curing time, then you know the mold surface is acting as an inhibitor.
Molds made from wood, plaster, metal or plastic should not cause inhibition if they are clean. To insure against possible
problems, it is advisable to seal the surface with RF-5215 or other appropriate sealer. Contact BJB s Tech Sales for additional
information.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 46
Gallon Kits 8 lbs. 13 oz. 185
5-Gallon Kits 40 lbs. 4 lbs. 924
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,395
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS :
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5041 A/B Page 1 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5041 A/B
40 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5041 A/B is a high tear strength, addition/platinum, room temperature curing silicone rubber designed for mold making,
encapsulation applications, pressure pads, gaskets, and various types of parts. It is also used to make molds for casting low
melting metals. With the use of talc powder as an interface the TC-5041 A/B has been used with cast metal temperatures
running 650 F (344 C). With the ability to withstand high temperatures the TC-5041 A/B works very well as a mask for metal
spraying and welding operations.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 40 5
Density (g/cc) ASTM D 792-00 1.38
Cubic Inches per Pound N/A 21
Color/Appearance Visual Dusty Blue
Tensile Strength (psi) ASTM D 412-98a (2002)e1 740
Elongation (%) ASTM D 412-98a (2002)e1 457
Tear Strength (pli) ASTM D 624-00e1 Die B 175
Coefficient of Thermal Expansion, (in/in/ F) ASTM E831 13.87 x 10
-5
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 14
Specific Gravity @ 77 F (25 C) 1.43 1.04
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 71,000 450
Mixed Viscosity (cps) @77 F (25 C) Brookfield 26,000
Work Time, 100g mass @ 77 F (25 C) 60 minutes
Gel Time 90 minutes
Demold Time @ 77 F (25 C) 6 8 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5041 A/B Page 2 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulphur containing and
organometallic salt containing compounds such as organic rubbers and many condensation cured RTV silicone rubbers.
Inhibition may easily be determined by brushing a small quantity of TC-5041 over a localized area of the surface to be
reproduced. If the TC-5041 is gummy or uncured after the curing time, then you know the mold surface is acting as an inhibitor.
Molds made from wood, plaster, metal or plastic should not cause inhibition if they are clean. To insure against possible
problems, it is advisable to seal the surface with RF-5215 or other appropriate sealer. Contact BJB s Tech Sales for additional
information.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 46
Gallon Kits 8 lbs. 13 oz. 185
5-Gallon Kits 40 lbs. 4 lbs. 924
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,395
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS :
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5041 A/B Page 1 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5041 A/B
40 SHORE A
ROOM TEMPERATURE CURING SILICONE
TC-5041 A/B is a high tear strength, addition/platinum, room temperature curing silicone rubber designed for mold making,
encapsulation applications, pressure pads, gaskets, and various types of parts. It is also used to make molds for casting low
melting metals. With the use of talc powder as an interface the TC-5041 A/B has been used with cast metal temperatures
running 650 F (344 C). With the ability to withstand high temperatures the TC-5041 A/B works very well as a mask for metal
spraying and welding operations.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 40 5
Density (g/cc) ASTM D 792-00 1.38
Cubic Inches per Pound N/A 21
Color/Appearance Visual Dusty Blue
Tensile Strength (psi) ASTM D 412-98a (2002)e1 740
Elongation (%) ASTM D 412-98a (2002)e1 457
Tear Strength (pli) ASTM D 624-00e1 Die B 175
Coefficient of Thermal Expansion, (in/in/ F) ASTM E831 13.87 x 10
-5
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 14
Specific Gravity @ 77 F (25 C) 1.43 1.04
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 71,000 450
Mixed Viscosity (cps) @77 F (25 C) Brookfield 26,000
Work Time, 100g mass @ 77 F (25 C) 60 minutes
Gel Time 90 minutes
Demold Time @ 77 F (25 C) 6 8 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5041 A/B Page 2 of 2 Date: 08/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials are sulphur containing and
organometallic salt containing compounds such as organic rubbers and many condensation cured RTV silicone rubbers.
Inhibition may easily be determined by brushing a small quantity of TC-5041 over a localized area of the surface to be
reproduced. If the TC-5041 is gummy or uncured after the curing time, then you know the mold surface is acting as an inhibitor.
Molds made from wood, plaster, metal or plastic should not cause inhibition if they are clean. To insure against possible
problems, it is advisable to seal the surface with RF-5215 or other appropriate sealer. Contact BJB s Tech Sales for additional
information.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 46
Gallon Kits 8 lbs. 13 oz. 185
5-Gallon Kits 40 lbs. 4 lbs. 924
55-Gallon Drum Kits 450 lbs. 45 lbs. 10,395
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS :
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5030 A/B Page 1 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5030 A/B
TRANSLUCENT SILICONE RUBBER
TC-5030 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various other types of parts. You can see through molds made from this material when
casting into it.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 30 5
Density (g/cc) ASTM D 792-00 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual Colorless/Translucent
Tensile Strength (psi) ASTM D 412-98a(2002)e1 700
Elongation (%) ASTM D 412-98a(2002)e1 400
Tear Strength (pli) ASTM D 624-00e1 Die B 65
Coefficient of Thermal Expansion, (in/in/ F) ASTM E 831 TBD
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight) 100 10
Mix Ratio (by volume) 100 12
Specific Gravity @ 77 F (25 C) 1.23 1.00
Color Colorless Colorless
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 45,000
Work Time, 100g mass @ 77 F (25 C) 30 minutes
Gel Time 75 minutes
Demold Time @ 77 F (25 C) 24 hours
Properties above are typical and not for specifications.
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials include condensation/tin cured
based silicone, lacquer and enamel coatings, polyester-based products, copper or copper containing metals, some SLA resins,
and natural rubbers like latex. Inhibition may easily be determined by brushing a small quantity of TC-5030 A/B over a
localized area of the surface to be reproduced. If the TC-5030 A/B is tacky or uncured after the cure time, then you know the
mold surface is acting as an inhibitor. Molds made from wood, plaster, steel, aluminum, or plastic should not cause inhibition
if they are clean. To insure against possible problems, it is advisable to spray a barrier film over any questionable surfaces.
This is the best way of treating clays and other surfaces that cause inhibition. Contact BJB for recommended products.
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5030 A/B Page 2 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 57
Gallon Kits 8 lbs. 13 oz. 227
5-Gallon Kits 40 lbs. 4 lbs. 1131
55-Gallon Drum Kits 450 lbs. 45 lbs. 12,722
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5030 A/B Page 1 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5030 A/B
TRANSLUCENT SILICONE RUBBER
TC-5030 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various other types of parts. You can see through molds made from this material when
casting into it.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 30 5
Density (g/cc) ASTM D 792-00 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual Colorless/Translucent
Tensile Strength (psi) ASTM D 412-98a(2002)e1 700
Elongation (%) ASTM D 412-98a(2002)e1 400
Tear Strength (pli) ASTM D 624-00e1 Die B 65
Coefficient of Thermal Expansion, (in/in/ F) ASTM E 831 TBD
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight) 100 10
Mix Ratio (by volume) 100 12
Specific Gravity @ 77 F (25 C) 1.23 1.00
Color Colorless Colorless
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 45,000
Work Time, 100g mass @ 77 F (25 C) 30 minutes
Gel Time 75 minutes
Demold Time @ 77 F (25 C) 24 hours
Properties above are typical and not for specifications.
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials include condensation/tin cured
based silicone, lacquer and enamel coatings, polyester-based products, copper or copper containing metals, some SLA resins,
and natural rubbers like latex. Inhibition may easily be determined by brushing a small quantity of TC-5030 A/B over a
localized area of the surface to be reproduced. If the TC-5030 A/B is tacky or uncured after the cure time, then you know the
mold surface is acting as an inhibitor. Molds made from wood, plaster, steel, aluminum, or plastic should not cause inhibition
if they are clean. To insure against possible problems, it is advisable to spray a barrier film over any questionable surfaces.
This is the best way of treating clays and other surfaces that cause inhibition. Contact BJB for recommended products.
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5030 A/B Page 2 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 57
Gallon Kits 8 lbs. 13 oz. 227
5-Gallon Kits 40 lbs. 4 lbs. 1131
55-Gallon Drum Kits 450 lbs. 45 lbs. 12,722
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5030 A/B Page 1 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5030 A/B
TRANSLUCENT SILICONE RUBBER
TC-5030 A/B is a room temperature, addition/platinum curing silicone rubber designed for mold making, encapsulation
applications, pressure pads, gaskets, and various other types of parts. You can see through molds made from this material when
casting into it.
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D 2240-04e1 30 5
Density (g/cc) ASTM D 792-00 1.08
Cubic Inches per Pound N/A 25.7
Color/Appearance Visual Colorless/Translucent
Tensile Strength (psi) ASTM D 412-98a(2002)e1 700
Elongation (%) ASTM D 412-98a(2002)e1 400
Tear Strength (pli) ASTM D 624-00e1 Die B 65
Coefficient of Thermal Expansion, (in/in/ F) ASTM E 831 TBD
Shrinkage (in/in) linear ASTM D2566 @ 1 depth Nil
HANDLING PROPERTIES Part A Part B
Mix Ratio (by weight) 100 10
Mix Ratio (by volume) 100 12
Specific Gravity @ 77 F (25 C) 1.23 1.00
Color Colorless Colorless
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 45,000
Work Time, 100g mass @ 77 F (25 C) 30 minutes
Gel Time 75 minutes
Demold Time @ 77 F (25 C) 24 hours
Properties above are typical and not for specifications.
INHIBITION:
Certain materials will cause inhibition or neutralization of the curing agent. These materials include condensation/tin cured
based silicone, lacquer and enamel coatings, polyester-based products, copper or copper containing metals, some SLA resins,
and natural rubbers like latex. Inhibition may easily be determined by brushing a small quantity of TC-5030 A/B over a
localized area of the surface to be reproduced. If the TC-5030 A/B is tacky or uncured after the cure time, then you know the
mold surface is acting as an inhibitor. Molds made from wood, plaster, steel, aluminum, or plastic should not cause inhibition
if they are clean. To insure against possible problems, it is advisable to spray a barrier film over any questionable surfaces.
This is the best way of treating clays and other surfaces that cause inhibition. Contact BJB for recommended products.
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5030 A/B Page 2 of 2 Date: 10/01/2020
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B
Cubic Inches
per Kit
Quart Kits 2 lbs. 3.2 oz. 57
Gallon Kits 8 lbs. 13 oz. 227
5-Gallon Kits 40 lbs. 4 lbs. 1131
55-Gallon Drum Kits 450 lbs. 45 lbs. 12,722
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses
or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
Silicone Handling Guide
by | Sep 27, 2025
TC-5024 A/B Page 1 of 2 Date: 07/18/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5024 A/B
25 SHORE A SILICONE ELASTOMER
TC-5024 A/B is a two-component, room temperature curing silicone elastomer. This system is designed primarily for making
molds, but is also used for gaskets as well as a wide variety of parts. This product is a condensation cured system using a tin
catalyst that provides a 30-minute work time with a 4-6 hour demold time.
Excellent physical properties with high tear
resistance
Fast demolds
Provides excellent detail reproduction Cures against various clays including Roma
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240-04e1 25 5
Density (g/cc) ASTM D792-00 1.21
Cubic Inches per Pound N/A 23.2
Color/Appearance Visual Blue/Opaque
Tensile Strength (psi) ASTM D412-98a(2002)e1 590
Tensile Modulus (psi) @ 100% ASTM D412-98a(2002)e1 44
Tensile Modulus (psi) @ 200% ASTM D412-98a(2002)e1 144
Tensile Modulus (psi) @ 300% ASTM D412-98a(2002)e1 280
Elongation (%) ASTM D412-98a(2002)e1 350
Tear Strength (pli) ASTM D624-00e1 Die B 110
Shrinkage (in/in) linear ASTM D2566 @ 1 depth 0.0025
Note: Reported physical properties are based on a 7 day room temperature cure.
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 12
Specific Gravity @ 77 F (25 C) 1.22 1.00
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 61,000 60
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 31,000
Work Time, 100g mass @ 77 F (25 C) 30 40 minutes
Gel Time 50 60 minutes
Demold Time @ 77 F (25 C) 4 6 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5024 A/B Page 2 of 2 Date: 07/18/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
MIXING:
TC-5024 A/B is processed by adding curing agent “B” at a ratio of 10 parts by weight to 100 parts by weight of “A”. TC-5024
“B” side is tinted blue so that when mixing the “A” and “B” sides together, the colorant in the “B” side will provide a visible
means of insuring that a uniform mix is acquired. Mix for 2 to 3 minutes in a clean container, then transfer material to another
clean container and mix for another 2 to 3 minutes.
INHIBITION:
New molds made with tin catalyzed silicones often have a tendency to inhibit the cure of softer elastomeric and aliphatic
urethanes (Water Clear Series) that are cast against the silicone. Post curing a new mold at 150 F for 24 hours may reduce the
cure inhibition problem in most cases. It is also recommended that the mold surface be washed thoroughly with soap and warm
water then dried before use.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B Cubic Inches per Kit
Quart Kits 2 lbs. 3.2 oz. 51
Gallon Kits 8 lbs. 13 oz. 205
5-Gallon Kits 40 lbs. 4 lbs. 1,021
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction.
Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek
qualified medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Methanol (by product), which is known to the State of
California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Silicone Handling Guide
by | Sep 27, 2025
TC-5024 A/B Page 1 of 2 Date: 07/18/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
TC-5024 A/B
25 SHORE A SILICONE ELASTOMER
TC-5024 A/B is a two-component, room temperature curing silicone elastomer. This system is designed primarily for making
molds, but is also used for gaskets as well as a wide variety of parts. This product is a condensation cured system using a tin
catalyst that provides a 30-minute work time with a 4-6 hour demold time.
Excellent physical properties with high tear
resistance
Fast demolds
Provides excellent detail reproduction Cures against various clays including Roma
PHYSICAL PROPERTIES TEST METHOD RESULTS
Hardness, Shore A ASTM D2240-04e1 25 5
Density (g/cc) ASTM D792-00 1.21
Cubic Inches per Pound N/A 23.2
Color/Appearance Visual Blue/Opaque
Tensile Strength (psi) ASTM D412-98a(2002)e1 590
Tensile Modulus (psi) @ 100% ASTM D412-98a(2002)e1 44
Tensile Modulus (psi) @ 200% ASTM D412-98a(2002)e1 144
Tensile Modulus (psi) @ 300% ASTM D412-98a(2002)e1 280
Elongation (%) ASTM D412-98a(2002)e1 350
Tear Strength (pli) ASTM D624-00e1 Die B 110
Shrinkage (in/in) linear ASTM D2566 @ 1 depth 0.0025
Note: Reported physical properties are based on a 7 day room temperature cure.
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 10
Mix Ratio by volume 100 12
Specific Gravity @ 77 F (25 C) 1.22 1.00
Color Off White Blue
Viscosity (cps) @ 77 F (25 C) Brookfield 61,000 60
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 31,000
Work Time, 100g mass @ 77 F (25 C) 30 40 minutes
Gel Time 50 60 minutes
Demold Time @ 77 F (25 C) 4 6 hours
SILICONE CASTING RUBBERS
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
TC-5024 A/B Page 2 of 2 Date: 07/18/2022
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
MIXING:
TC-5024 A/B is processed by adding curing agent “B” at a ratio of 10 parts by weight to 100 parts by weight of “A”. TC-5024
“B” side is tinted blue so that when mixing the “A” and “B” sides together, the colorant in the “B” side will provide a visible
means of insuring that a uniform mix is acquired. Mix for 2 to 3 minutes in a clean container, then transfer material to another
clean container and mix for another 2 to 3 minutes.
INHIBITION:
New molds made with tin catalyzed silicones often have a tendency to inhibit the cure of softer elastomeric and aliphatic
urethanes (Water Clear Series) that are cast against the silicone. Post curing a new mold at 150 F for 24 hours may reduce the
cure inhibition problem in most cases. It is also recommended that the mold surface be washed thoroughly with soap and warm
water then dried before use.
STORAGE:
Store ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 12 months from date of
shipment when properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
PACKAGING Part A Part B Cubic Inches per Kit
Quart Kits 2 lbs. 3.2 oz. 51
Gallon Kits 8 lbs. 13 oz. 205
5-Gallon Kits 40 lbs. 4 lbs. 1,021
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged
contact on the skin may cause an allergic reaction.
Eye protection is extremely important. Always use approved safety glasses or goggles when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvent only increase contact and dry skin. Seek
qualified medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only
as directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Methanol (by product), which is known to the State of
California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Silicone Handling Guide
