TrueCast 360 is a versatile, two component liquid castable polyurethane elastomer. Individual components are colored for visually determining complete mixing. TrueCast 360 can be used for rapid production of parts or molds with excellent physical properties. Some features include good grease and oil resistance, good flow into fine detail, good adhesion between pours and good dimensional stability. It is also tough, with high tear strength, is rapid curing, insensitive to typical environmental moisture, and has long mold storage life, low viscosity and low shrinkage.

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 One-Hundred (100) parts of Component A to Fifty (50) parts 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 360 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.


Working Properties

Mix Ratio By Weight

100 parts A/ 50 part B

Mix Ratio By Volume

100 parts A/ 51.56 parts B

Viscosity @ 72°F (A Side)

4500 CPS

Viscosity @ 72°F (B Side)

500 CPS

Viscosity @ 72°F (Mixed)

3500 CPS


Part A:



Part B:

Transparent Blue



Transparent Blue

Working Life @ 72°F

10-15 minutes

Full Cure Time* @ 72°F

24 hours

* Set time and Demold time depends on temperature and relative humidity.


Physical Properties

Specific Gravity (Part A)


Specific Gravity (Part B)


Specific Gravity (Mixed)


Weight/Gallon Part A

8.62 lbs.

Weight/Gallon Part B

8.37 lbs.

Weight/Gallon Mixed

8.53 lbs.

Cubic inch per lb. of product


Hardness @ 72° F

ASTM 2240-85

50-55 Shore A

Tear Strength

ASTM D-624

220 lb./in.

Tensile Strength

ASTM D-412 die C

1494 psi


ASTM D-412 die C


Shrinkage, inches

ASTM D-2566


Modulus (100%)

ASTM D-417-68



Clean Up

Dispose of all empty TrueCast 360 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 360 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.


Shipping Class: Class 55 Non-hazardous