by | Sep 27, 2025
470 E. BONITA AVE., POMONA, CA 91767
PH (909) 625-0056 WWW.SILPAK.COM FX (909) 625-0082
Latex Rubber
RL-SPRAY
Product Data Sheet
RL-SPRAY is a one-part, extremely low viscosity liquid latex that air cures to a strong, papery thin, rubber. Its high elasticity
strength, watery consistency and ability to capture infinite detail make this an ideal sprayable material. It also works well for
making latex appliances in plaster molds made of Hydrocal White. Latex needs to semi dry between coats as multi-layer parts
are being created. Latex will reproduce detail, but has the highest shrink rate of all rubber materials.
Available Sizes: Pint & Quart, Gallon & 5 Gallon, 55 Gallon Drum
Accessories
Pigments Red, Blue, Yellow, Black, White
RL-Thinner Add to adjust latex thickness Better than adding distilled water!!
Hydrocal White Plaster for slush cast molds
Model Preparation:
Model s surface should be clean and free of oil and dirt. Oil clay, wood, stone, and glazed ceramics normally don t need to be
sealed. Plaster, concrete, water-based clay, copper containing items should be sealed with shellac or compatible sealer. For all
other surfaces, run a small test to ensure compatibility if latex sticks or turns dark, apply sealer. Next, secure model to a base
board plywood or something similar.
Processing & Curing Instructions:
Slush casted latex such as a mask or a thin rubber product can be made from dry, unsealed Hydrocal White or
Ultracal 30 plaster molds. After mold is made, dry it in oven at 150F for several hours (this will give plaster mold the best water
absorption ability). Allow mold to cool, then fill mold cavity up with latex and reseal the container to avoid evaporation of
water/ammonia. Lightly vibrating mold may help eliminate bubbles if mold is highly intricate. Latex will thicken against mold
surface as plaster absorbs water. For a thin skin, pour the excess latex immediately back into container. For a thick skin, allow
latex filled mold to sit 1-2 hours, depending on desired thickness, before pouring excess latex material back into container. Latex
is then allowed to dry in mold for 24-36 hours at room temperature. Drying time is based on temperature and humidity. Dry,
warm air is required for fast curing. A de-humidifier can be used for humid conditions. Accelerated cure can be achieved by
oven drying at 100-150F till rubber changes color (darkens). Remove rubber and repeat process. Heat curing will speed up
process, producing parts in hours.
Dipping rubber parts requires a positive of master made of plaster, epoxy or aluminum. Compensate for shrinkage
when building master. Dipping process can be basic dip and hung to dry, or accelerated by the use of RL-CN (Cure accelerator
spray solution) and oven dried.
Spraying latex requires an industrial airless sprayer. Allow each coat to change color before applying additional coats,
or spray part and oven dry between coats 100-150F. Clean sprayer immediately after using and reseal latex container. RL-
Thinner can be used to dilute thickened latex.
Using Latex:
Avoid contact with copper containing metals, oils or solvents. Avoid using petroleum based products, solvents and copper
containing metals with latex rubber. Clean latex with soap and water. Keep cured latex rubber out of direct sunlight.
Storage/Shelf Life:
Store liquid material in cool, dry area out of direct sunlight, in tightly sealed containers, above 60F. Do not allow liquid material
to freeze which will damage latex causing irreversible coagulation.
THE INFORMATION AND DATA CONTAINED HEREIN ARE BASED ON INFORMATION THAT WE BELIEVE TO BE RELIABLE. EACH
USER OF THE MATERIAL SHOULD THOROUGHLY TEST ANY APPLICATION, AND INDEPENDENTLY CONCLUDE SATISFACTORY
PERFORMANCE BEFORE COMMERCIALIZING. SUGGESTIONS OF USAGE SHOULD NOT BE TAKEN AS INDUCEMENTS TO
INFRINGE ON ANY PARTICULAR PATENT.
by | Sep 27, 2025
RELEASE #78 Page 1 of 2 Date: 11/18/2021
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
PIGMENT, RELEASE & MISCELLANEOUS PRODUCT
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
RELEASE #78
Release #78 is a highly effective silicone based release agent designed to release polyurethane elastomers from epoxy, polyester,
rubber, aluminum, and steel molds. Release #78 is a non-aerosol, bulk version of BJB s E-236 urethane release.
Easy to apply
Effective in a temperature range from 70-500 F (21-260 C)
Fast drying
Excellent surface finish to molded parts
APPLICATION:
Thoroughly clean mold to remove all traces of previous coatings and oils. Apply Release #78 using spray equipment. Hold the spray
gun 6 – 8 inches from the mold surface to ensure a light, even coating. When the molds are new or have been blasted with an abrasive,
season the mold by applying a heavy coating of release. Heat the mold to process temperature, then wipe the excess with a rag and
reapply a light coating of Release #78 before a regular molding. Release #78 is fast drying and requires no baking during the normal
molding process. Reapply a light coat before each molding.
NOTE:
Due to the silicone content of this release and its transfer to fabrication materials, finished parts must be abraded and cleaned prior to
any post mold finishing such as bonding or painting. Consult BJB s, technical service department for help with non or low transfer
release agent recommendations.
STORAGE:
Store at 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
Release #78 is available in quart, gallon, and 5-gallon size containers.
SAFETY PRECAUTIONS :
Use in a well-ventilated area. Avoid contact with skin by 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.
An ISO-9001 Certified company
RELEASE #78 Page 2 of 2 Date: 11/18/2021
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.”
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.
by | Sep 27, 2025
470 E. BONITA AVE., POMONA, CA 91767
PH (909) 625-0056 WWW.SILPAK.COM FX (909) 625-0082
Latex Brush-On Rubber
RL-461
Product Data Sheet
RL 461 is a one-part, brush on, medium solids liquid latex that is applied in layers to build a highly tough, tear resistant and
durable mold rubber. Molds are best used to cast plaster and concrete. It is also works well as a texture pad for decorating
concrete or clay models. Latex needs to semi dry between coats as multi layer molds or parts are being created.
Available Sizes: Pint & Quart, Gallon & 5 Gallon, 55 Gallon Drum
TYPICAL PROPERTIES OF CURED RUBBER
Durometer: 40 Shore A
Coverage: lb, 1 ft
2
x 1/16 Thick
Accessories
RL-Thinner Add to adjust latex thickness Better than adding just distilled water!!
RL-400 T Thickener, ground black organic rubber use for plugging undercuts in molds
Burlap Cloth use for reinforcement
MR-100-50 Casting release used for concrete and plaster to improve surface finish
CO-1 Castor Oil release used for concrete and plaster
Model Preparation:
Model s surface should be clean and free of oil and dirt. Oil clay, wood, stone, and glazed ceramics normally don t need to be
sealed. Plaster, concrete, water-based clay, copper containing items should be sealed with shellac or compatible sealer. For all
other surfaces, run a small test to ensure compatibility if latex sticks or turns dark, apply sealer. Next, secure model to a base
board plywood or something similar.
Processing & Curing Instructions: Mold Making
Fasten the part to be molded to a firm base so as to avoid handling piece during brushing No release is necessary in
most cases unless part is highly porous then sealer is applied. When brushing on latex, care should be taken to brush out all
bubbles to assure a smooth, detailed first coat so void-free positives can be made. Brush from the top of model to bottom then
continue on out from base, a distance of about 1.5 – 2 , to create a supporting flange. Continue to build-up flange with each
successive layer of latex. When dry, flange provides an aid in the handling of mold during casting process.
After the first coat has become dry to the touch, subsequent coats may be added allowing each coat to dry before
applying next coat. Depending on environmental conditions the drying time will change from hours to portion of a day 4 to 16
hours. Drying time depends on temperature and humidity and can be improved by the use of heat and moving air over the
surface, with 1 to 2 coats per day. When dry, latex will change color from creamy white to a light tan. Mold consists of 8 to 20
coats depending on desired thickness and latex system used. Thickness ranges between 1/8 and inch thick. Each additional
coating should be brushed in alternating directions (top to bottom, right to left, diagonally) with a checkerboard coat in between
so a laminated structure is created. Applying this technique reduces the dimensional shrinkage of the finished mold.
For deep undercut areas, use RL 400T (thickening/plugging filler). Add to latex system until desired paste is created
a thick peanut butter like consistency and apply to outside latex mold. Once area is filled and allowed to dry, usually within the
hour, brush a final coat of straight latex to seal up area.
To maximize the strength properties of the mold, allow it to fully cure in a warm area for 1-2 weeks before placing into
production. Otherwise, accelerated cure can be achieved if mold is warmed in an oven at 100 to 150F. Once mold is fully cured,
a mother mold support is made out of fiberglass or plaster to support the latex mold.
Using Mold:
Avoid contact with copper containing metals, oils or solvents. When casting with concrete and plaster, using a casting release
MR-100-50 or CO-1 (Castor Oil) is recommended. Wetting the mold s surface prior to casting will assist in eliminating air
bubbles from the mold s surface. Clean latex with soap and water. Keep cured latex rubber out of direct sunlight.
Storage/Shelf Life
Store liquid material in cool, dry area out of direct sunlight, in tightly sealed containers, above 60F. Use within 6months. Do not
allow liquid material to freeze which will damage latex causing irreversible coagulation.
THE INFORMATION AND DATA CONTAINED HEREIN ARE BASED ON INFORMATION THAT WE BELIEVE TO BE RELIABLE. EACH
USER OF THE MATERIAL SHOULD THOROUGHLY TEST ANY APPLICATION, AND INDEPENDENTLY CONCLUDE SATISFACTORY
PERFORMANCE BEFORE COMMERCIALIZING. SUGGESTIONS OF USAGE SHOULD NOT BE TAKEN AS INDUCEMENTS TO
INFRINGE ON ANY PARTICULAR PATENT.
by | Sep 27, 2025
RELEASE #76 Page 1 of 1 Date: 06/21/2022
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.”
PIGMENT, RELEASE & MISCELLANEOUS PRODUCT
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
Quality
Managemen
t
System
RELEASE #76
Release #76 is a non-silicone based release agent designed to release a variety of polyurethane material systems from epoxy,
polyester, rubber, aluminum and steel mold surfaces. In most applications the use of this release eliminates the need to sand or
chemically clean part surfaces when preparing for painting or bonding. Cleaning with a liquid soap and water wash is recommended
to remove any residue that may occur on molded parts.
Easy to apply Provides a matte or semi-gloss finish
Does not contain silicone Minimal build-up
APPLICATION:
Thoroughly clean and dry mold surfaces prior to applying Release #76. Apply Release #76 with a spray gun at a distance of 6 to 8
inches away from the mold surface. Adjust spray gun air pressure to ensure a light even coating. New molds or those that have been
chemically cleaned may require an initial heavy application of release and a wipe-out of the excess. It is best to then apply another
light coat prior to use. Release #76 contains petroleum hydrocarbons as the solvent carrier. The dry time for this release may be
extended on cold molds due to its solvent carrier. Mold temperatures in excess of 80 F. will enhance dry time and reduce cycle
times. Generally this release must be applied after each mold cycle. Normally only a very light coat is required after the mold has
been seasoned.
STORAGE:
Store in a cool dry place. Unopened containers will have a shelf life of 6 months from date of shipment when properly stored at room
temperatures.
PACKAGING
Release #76 is available in 1-gallon, and 5-gallon containers
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin by 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.
by | Sep 27, 2025
by | Sep 27, 2025
by | Sep 27, 2025
by | Sep 27, 2025
by | Sep 27, 2025
by | Sep 27, 2025
Product Information
Construction
SealantsDow Corning
Tub, Tile
& Ceramic Silicone Sealant
FEATURES
Cures to 100% silicone rubber
Fast cure, high strength
Clear, white, translucent white and
almond colors meet the require-
ments of FDA Regulation No. 21
CFR 177.2600
BENEFITS
Cured sealant is mildew resistant
Remains flexible; will not become
brittle, crack, shrink or chalk
Bond to many common kitchen and
bath substrates
Supplied in removable, reusable,
resealable nozzle that saves time
and sealant
COMPOSITION
One-part, acetoxy-cure, RTV
silicone
Dow Corning Tub, Tile & Ceramic
Silicone Sealant is available from:
One-part acetoxy-cure silicone sealant for non-porous substrates
APPLICATIONS
As an adhesive, sealant or grout for repairing or replacing ceramic tiles
Tub and shower enclosures
Forming watertight seals around bathtubs, shower enclosures, sinks, vanities,
countertops, lavatories, faucets, saunas, hot tubs, plumbing fixtures, drains,
piping, shower doors and floor seams
TYPICAL PROPERTIES
Specification Writers: Please contact your local Dow Corning Sales Application Engineer
or Dow Corning Customer Service before writing specifications on this product.
Test Unit Result
Tooling Time
1
minutes 5-10
Tack-Free Time
1
minutes 15-20
Complete Set-Up Time
1
,
1/8″ hours 24
Cure System Acetoxy
Application Temperature Range F ( C) -20 to 122 (-29 to 50)
VOC Content
2
g/L 33
As Cured After 7 days
Durometer Hardness Shore A points 27
Tensile Strength psi 325
Elongation percent 600
Temperature Range (Continuous) F ( C) -40 to 350 (-40 to 176)
Movement Capability percent 25
1
At 77 F (25 C) and 50% relative humidity.
2
Based on South Coast Air Quality Management District of California. Maximum VOC is listed both inclusive and
exclusive of water and exempt compounds. For a VOC data sheet for a specific sealant color, please send your request
to product.inquiry@dowcorning.com.
DESCRIPTION
Dow Corning
Tub, Tile & Ceramic
Silicone Sealant is a one-part acetoxy-
cure silicone sealant for non-porous
surface applications requiring a sealant
that is mildew-resistant when cured.
Dow Corning Tub, Tile & Ceramic Sili-
cone Sealant meets the requirements of:
FDA Regulation No. 21 CFR
177.2600 (standard colors only;
custom colors do not comply)
HOW TO USE
1. Refer to product packaging for
use-by date.
2. Temperature. Apply sealant at
temperatures between -20 and 122 F
(-29 and 50 C) for best results.
3. Prepare surface. Cut out and
remove all old caulk for repair
applications.
4. Clean, Two-Step. First, apply solvent
to a lint-free cloth and vigorously
wipe bonding surfaces to remove
dirt and residues. Next, use a dry
wipe to remove remaining solvent
and residue for optimum cleaning.
Repeat if necessary. Surfaces must
be clean, dry, oil-and frost-free
for best results. (Recommended
solvents include isopropyl alcohol,
toluene, xylene, naphtha or similar
solvent.) Always wear gloves and
follow safety precautions and
directions on solvent container.
DO NOT USE gasoline or kerosene.
5. Install. Install back-up spacing
material for better filling, especially
if width exceeds 1/2″ to maximize
bonding results. Open-cell polyeth-
ylene foam backer rod can be used.
6. Mask. Apply masking tape to
areas adjacent to the joint to
ensure straight bead lines and
easy cleanup. Remove masking
tape immediately after the bead is
completed and before a skin forms.
7. Open cartridge. Cut snub nose
above threads, reattach and cut
nozzle to desired size. Insert into a
caulking gun.
8. Apply. Extrude sealant with a
smooth, steady motion, and ensure
complete fill of joint cavity before
proceeding.
9. Tool. Tool the sealant immediately
after application and before a skin
forms. Remove masking immedi-
ately after tooling.
10.Replace cartridge cap. See Usable
Life and Storage instructions.
Cleanup Instructions
1. Cleanup should start immediately
after sealant has been applied/
tooled and masking tape removed.
2. While wearing solvent-resistant
gloves, wipe off excess sealant from
surfaces and tools with a solvent-
moistened cloth within 10 minutes
of application.
3. If excess sealant is completely
cured, carefully cut or scrape away.
4. Avoid contact of uncured sealant
with skin and clothing. If contact
does occur, wipe with clean rags
and wash with water.
HANDLING PRECAUTIONS
Product safety information required
for safe use is not included in this
document. Before handling, read
product and material safety data
sheets and container labels for safe
use, physical and health hazard
information. The Material Safety
Data Sheet is available from your
Dow Corning Sales Application
Engineer, or distributor, or by writing
to Dow Corning Customer Service at:
Customer Service
Dow Corning Corporation
P.O. Box 994
Midland, MI 48686
or by calling:
U. S……………………1-800-248-2481
Mexico…………….01 800 50 315 00
Canada……………….1-800-268-5359
USABLE LIFE AND
STORAGE
Store below 90 F (32 C) in a dry
place. Dow Corning Tub, Tile &
Ceramic Silicone Sealant has a usable
life of 30 months from date of manu-
facture. Refer to product packaging for
use-by date.
To store short term, replace cap. To
store long term, unscrew nozzle, screw
cap in cartridge and store nozzle in cap.
PACKAGING
Dow Corning Tub, Tile & Ceramic
Silicone Sealant is supplied in a
10.3-fl oz (305-mL) cartridge with a
3-piece reusable, removable and reseal-
able nozzle.
Clear
Container Bar Code Number
Cartridge UPC 0 77472 14014 5
Shipping Box UPC 0 77472 14015 2
Shipping Box I2 of 5 1 00 77472 14014 2
White
Container Bar Code Number
Cartridge UPC 0 77472 14041 1
Shipping Box UPC 0 77472 14042 8
Shipping Box I2 of 5 1 00 77472 14041 8
Snowy White
Container Bar Code Number
Cartridge UPC 0 77472 14016 9
Shipping Box UPC 0 77472 14017 6
Shipping Box I2 of 5 1 00 77472 14016 6
Translucent White
Container Bar Code Number
Cartridge UPC 0 77472 14136 4
Shipping Box UPC 0 77472 14137 1
Shipping Box I2 of 5 1 00 77472 14136 1
Almond
Container Bar Code Number
Cartridge UPC 0 77472 14038 1
Shipping Box UPC 0 77472 14039 8
Shipping Box I2 of 5 1 00 77472 14038 8
TO ORDER
Product/
Part Number Color Size
4045036 Clear 10.3 fl oz
4045039 White 10.3 fl oz
4045037 Snowy White 10.3 fl oz
4045038 Translucent White 10.3 fl oz
4045034 Almond 10.3 fl oz
LIMITATIONS
Not for structural glazing
Not paintable
Not suited for prolonged submer-
sion in water or below-grade
applications. Not for aquarium use;
product contains a fungicide
May not adhere to oily woods or be
compatible with substrates made of
methylmethacrylate, polycarbon-
ate, polypropylene, polyethylene,
and polytetrafluoroethylene
Not suitable for surfaces that might
bleed oils, plasticizers or solvents,
or porous surfaces such as cement-
like materials, stone or surfaces
prone to attack by weak acids
May not cure properly if used in
spaces confined from atmospheric
moisture
May cause corrosion on some
brass, copper, zinc or zinc alloy-
containing fixtures
Not for use where abrasion and
physical abuse are encountered
This product is neither tested nor
represented as suitable for medical
or pharmaceutical uses
HEALTH AND
ENVIRONMENTAL
INFORMATION
To support customers in their product
safety needs, Dow Corning has an
extensive Product Stewardship organ-
ization and a team of Product Safety
and Regulatory Compliance (PS&RC)
specialists available in each area.
For further information, please see
our website, www.dowcorning.com,
or consult your local Dow Corning
Sales Application Engineer.
LIMITED WARRANTY
INFORMATION PLEASE
READ CAREFULLY
The information contained herein is
offered in good faith and is believed
to be accurate. However, because
conditions and methods of use of our
products are beyond our control, this
information should not be used in sub-
stitution for customer s tests to ensure
that Dow Corning s products are safe,
effective, and fully satisfactory for the
intended end use. Suggestions of use
shall not be taken as inducements to
infringe any patent.
Dow Corning s sole warranty is
that the product will meet the
Dow Corning sales specifications
in effect at the time of shipment.
Your exclusive remedy for breach of
such warranty is limited to refund of
purchase price or replacement of any
product shown to be other than as
warranted.
DOW CORNING SPECIFICALLY
DISCLAIMS ANY OTHER
EXPRESS OR IMPLIED
WARRANTY OF FITNESS FOR
A PARTICULAR PURPOSE OR
MERCHANTABILITY.
DOW CORNING DISCLAIMS
LIABILITY FOR ANY INCIDEN-
TAL OR CONSEQUENTIAL
DAMAGES.
Printed in USA Dow Corning is a registered trademark of Dow Corning Corporation.
Form No. 62-650C-01 AGP7127 2000, 2002, 2003, 2004 Dow Corning Corporation. All rights reserved.
