PT Flex 20 Casting Rubber

PT Flex 20 Liquid Rubber has the lowest durometer (Shore A20) in the PT Flex Series. It is a very flexible and fast-curing rubber designed for prototyping and model making applications.

PT Flex 20 offers a 4-minute pour time and a ~2-hour demold time at room temperature (30-minute demold time at 70°C) and is very low in viscosity, which makes it easy to mix and pour without trapping bubbles.

It is excellent for casting decorative objects, props, production parts, tools, models, special effects castings, patterns, duplicate masters and more. This rubber can also be used to make molds in a timely fashion.

PT Flex 20 can be colored with PolyColor Dyes.



Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time Shrinkage upon Cure Tensile Strength Tear Strength
1A:1B A20 4 min. Tan 520 cP 27.5 in³/lb ~2 hr at room temp. 0.0050* in/in 250 psi 50 pli
Accessories: PolyColor Dyes74/75 Part C Softener74/75 Part X AcceleratorPolyFiber II Thickening AgentUV AdditiveTietex® FabricPoly Purge Aerosol Dry Gas


Product Literature: Technical Bulletin | Safety Data Sheets | Sealer & Release Agent Selection Guide


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