TC-1650 A/B Page 1 of 2 Date: 03/20/2023
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
EPOXY RESIN SYSTEMS
By BJB Enterprises. Inc.
An ISO-9001 Certified company
TC-1650 A/B
HI-TEMP ALUMINUM FILLED CASTING RESIN SYSTEM
TC-1650 A/B is an aluminum powder filled epoxy casting resin system that provides service temperatures to 350 F (177 C).
TC-1650 A/B is most commonly used for the construction of molds that require good heat conductivity, outstanding durability
and provide production run capability. The majority of applications for TC-1650 A/B are used in conjunction with other
materials in developing composite mold structures; however, the TC-1650 A/B is frequently used by itself.
Molds for casting polyurethane, epoxy, polyester, and other materials
Vacuum form molds
Wax casting molds
Compression molds
MOLD CONSTRUCTION :
The composites approach to mold construction uses TC-1650 A/B as a binder for SC-125 Aluminum Granules. This mixture is
cast behind a high temperature surface coat, TC-1611 A/B or TC-1618 A/B. This combination provides several benefits. The
high temperature surface coat provides exceptional durability while the aluminum granule addition to the TC-1650 A/B vastly
increases heat conductivity and reduces shrinkage. Using this method will also decrease cost. Generally, the SC-125 Aluminum
Granule is added at the rate of 60-80 parts by weight to 100 parts by weight mixed resin and hardener. Larger amounts of
aluminum granules are added when making vacuum form molds, casting molds, foam molds and other low pressure compression
type molds.
CAUTION: If casting TC-1650 A/B requires sections to be thicker than 1 , use TC-1651 A/B for thicknesses up to 3 . Request
BJB technical advice for additional assistance.
PHYSICAL PROPERTIES TEST METHOD TEST RESULTS
Hardness, Shore D ASTM D2240 90 2
Density (g/cc) ASTM D792 1.76
Cubic Inches per Pound N/A 17
Color/Appearance Visual Gray
Tensile Strength (psi) ASTM D638 8,150
Flexural Strength (psi) ASTM D790 11,100
Flexural Modulus (psi) ASTM D790 1.06 x 10
6
Shrinkage (in/in) linear ASTM D2566 0.002
Heat Deflection Temperature @ 264 psi ASTM D648 283 F (139.4 C)
Compressive Strength (psi) ASTM D695 27,800
Coefficient of Thermal Expansion (in/in/F ) ASTM D3386 1.9 x 10
-5
TC-1650 A/B Page 2 of 2 Date: 03/20/2023
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.”
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 100 7
Mix Ratio by volume 100 13
Specific Gravity @ 77 F (25 C) 1.8 0.98
Color Gray Amber
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 15,500
Work Time, 1 lb. mass @ 77 F (25 C) 60 minutes
Gel Time 90 minutes
Demold Time @ 77 F (25 C) 16 24 hours
Properties above are typical and not for specifications.
POST CURING:
All physical property results are based upon post-curing this system. The following procedure provides the best results:
75 F (24 C) for 12 to 20 Hours
150 F (66 C) for 1.5 to 2 Hours
250 F (121 C) for 2 Hours
350 F (177 C) for 1 Hour
Turn off oven and allow to cool in the oven. This procedure provides further stabilization and eliminates possible thermal shocks for cavity
tools that are temporarily clamped together for curing purposes.
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 Part A Part B
Square Inches per Kit
Coverage (@ 1/16 Thick)
Quart Kits 2.5 lbs. 3 oz. 46
Gallon Kits 10 lbs. 12 oz. 183
5-Gallon Kits 50 lbs. 3.5 lbs. 910
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.
WARNING: This product can expose you to chemicals including 4,4 -Isopropylidenediphenol, which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.