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Poly-Fast 72-40 Liquid Rubber

Poly-Fast 72-40 Liquid Rubber


Poly-Fast 72-40 Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to an ivory, Shore A40 rubber. This is a pourable rubber, but it can be easily thickened with Poly-Fast Part D Thickener or Fumed Silica for brush-on application.

WARNING: This product can expose you to chemicals including Butyl benzyl phthalate (BBP) and Phenylmercuric compounds, which are known to the State of California to cause reproductive harm. For more information, go to


This 49.5-lb kit includes:
4.5 lb of Poly-Fast 72-40 Part A (~2 quarts)
45 lb of Poly-Fast 72-40 Part B (~5 gallons)

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