Polytek 75-70 Polyurethane Liquid Mold Rubber


Poly 75-70 Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to a gray, Shore A70 rubber. This is a pourable rubber, but it can be easily thickened with PolyFiber II Thickener for brush-on application.

Mix Ratio: 1A/ 1B by weight
Shore Hardness: A70
Cured Color: Gray
Mixed Viscosity: 3000 cP

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. For additional physical property specifications, refer to the Physical Properties Bulletin.

Polytek® mold rubbers are used to produce various precast concrete hardscape products, including pavers, stepping stones, patio stones, rock face liners, fire pits, retaining wall block, pier and wall caps and more. These two-part, room temperature curing systems provide a flexible mold solution that can be used to cast hundreds of parts in the mold’s lifetime. 

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