Product code: M50107
PT Flex 70 Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to a yellow/amber, Shore A70 rubber. PT Flex Series rubbers were specifically designed for prototyping and model making applications and offer fast pour times (~4 minutes) and fast demold times (~2 hours).

Mix Ratio

Shore Hardness

Pour Time

Cured Color

Mixed Viscosity

Specific Volume

Demold Time

Shrinkage upon Cure

Tensile Strength

Tear Strength

1A:1B by weight


4 min.


700 cP

26.4 in³/lb

~2 hr at room temp.

0.0046 in/in

730 psi

130 pli

The color of polyurethane Part Bs may change in color from batch to batch or with time, but product performance is not affected. For additional physical property specifications, refer to the Physical Properties Bulletin.
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Brand PS Composites
Product Code M50107
Weight 10kg