TrueCast 40 Translucent is a versatile, two component liquid castable polyurethane elastomer. TrueCast 40 Translucent combines high strength and elongation with excellent chemical resistance to create durable flexible molds or parts.
Features
- Insensitive to typical environmental moisture
- High strength and low durometer
- Low residual surface tack
- Tough, with high tear strength and low viscosity
- Good grease and oil resistance
- Good flow into fine detail
- Good dimensional stability
- Good adhesion between pours
Application and Mix Ratio
Component A and component B are supplied in 1 and 5 gallon plastic containers. Component B should be thoroughly mixed before using. Component A does not need mixing. Carefully weigh out equal portions of component A and component B. Mix together for 1 to 2 minutes by hand using a spatula for small batches (1/2 gallon or less), or electric drill and jiffy mixer for larger batches. Use silicone mold release, even when using a silicone mold to avoid residual tack. Molds may be dusted with talc powder before pouring in liquid to produce a tack free permanent surface on cured parts. TrueCast 40 Translucent is fully cured in 24 hours at 72°F. Colder curing temperatures will lengthen cure times. Warmer temperatures will greatly reduce working and cure times. Curing can be heat accelerated (150°F/ 8 hours) to speed up processing. Use methyl ethyl ketone (MEK), acetone or mineral spirits for clean-up.
Properties
Working Properties
|
Mix Ratio By Weight |
100 parts A/ 100 part B |
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Mix Ratio By Volume |
100 parts A/ 99 parts B |
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Viscosity @ 72°F (Mixed) |
1100 CPS |
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Color |
Part A: |
Clear |
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Color |
Part B: |
Clear |
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Color |
Mixed: |
Clear |
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Working Life @ 72°F |
20-30 minutes |
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Full Cure Time* @ 72°F |
24 hours |
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* Set time and Demold time depends on temperature and relative humidity.
Physical Properties
|
Specific Gravity (Part A) |
1.05 |
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Specific Gravity (Part B) |
1.04 |
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Specific Gravity (Mixed) |
1.04 |
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Weight/Gallon Part A |
8.72 lbs. |
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Weight/Gallon Part B |
8.64 lbs. |
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Weight/Gallon Mixed |
8.68 lbs. |
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Cubic inch per lb. of product |
26.61 in3/lb. |
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Hardness @ 72° F |
ASTM 2240-85 |
35-45 Shore A |
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Tear Strength |
ASTM D-624 |
223 lb./in. |
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Tensile Strength |
ASTM D-412 die C |
988 psi |
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Elongation |
ASTM D-412 die C |
555% |
Clean Up
Dispose of all empty TrueCast 40 Translucent component containers in accordance with local, state and federal regulations. Empty component containers can be rendered non-hazardous by rinsing the containers with a small amount of mixed material and allowing material to cure for 24 hours. The containers will then contain non-hazardous cured urethane.
Storage and Shelf Life
TrueCast 40 Translucent is shipped from the factory in sealed containers. The containers should be stored in a cool, dry area that is protected from direct sunlight and moisture. Storage temperatures should not exceed 80°F. The shelf life of the factory sealed containers stored under these conditions is six months. Containers that have been opened should be resealed immediately after material has been removed in order to prevent solvent evaporation.