PT Flex 85 Casting Rubber – New & Improved

PT Flex 85 Liquid Rubber is a very firm (Shore A85), fast-curing polyurethane rubber in the PT Flex Series, a line that was developed specifically for prototyping and model making applications.

It offers a 4-minute working time and a ~2-hour demold time at room temperature (30-minute demold time at 70°C).

It is excellent for casting decorative objects, production parts, tools, models, patterns, duplicate masters and more. With the addition of PolyColor Dyes, PT Flex products can be used to cast parts of any color.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time Shrinkage upon Cure Tensile Strength Tear Strength
1A:1B A85 4 min. Yellow/Amber 750 cP 26.2 in³/lb ~2 hr at room temp. 0.0016* in/in 1,064 psi 190 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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