Poly Plasti-Flex Liquid Plastic


Poly Plasti-Flex is a flexible polyurethane casting plastic that is most often used for making slightly flexible and impact-resistant parts such as decorative trim, flex molding and millwork. Poly Plasti-Flex also works well for casting props and display items requiring high impact resistance. This product can be machined, drilled, and sanded (contains no silica).

WARNING: This product can expose you to chemicals including Phenylmercuric compound, which is known to the State of California to cause reproductive harm. For more information, go to www.P65Warnings.ca.gov


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Technical Specifications

Mix Ratio by Weight:
Shore Hardness:
Pot Life:
3 min.
Demold Time:
15 min.
Cured Color:
Mix Viscosity:
3,000 cP
Specific Volume:
34 in³/lb
Specific Gravity:
81 %
Tensile Strength:
1,330 psi
Elastic Modulus:
29,450 psi
Max Exotherm:
Shake or stir Part A & Part B before use. The color of polyurethane Part Bs may change in color from batch to batch or may darken with age, but product performance is not affected.

More Information

Material Calculator

Technical Bulletin

Safety Data Sheet - Part A

Safety Data Sheet - Part B

Kit Components
Poly Plasti-Flex Components
8.1-lb kit includes: 2.1 lb of Poly Plasti-Flex Part A (~1 quart)
6 lb of Poly Plasti-Flex Part B (~1 gallon)
38.5-lb kit includes: 10 lb of Poly Plasti-Flex Part A (~1 gallons)
28.5 lb of Poly Plasti-Flex Part B (~5 gallons)
192.5-lb kit includes: 50 lb of Poly Plasti-Flex Part A (~5 gallons)
142.5 lb of Poly Plasti-Flex Part B (~25 gallons)