Polytek 74-20 Polyurethane Liquid Mold Rubber
Poly 74-20 Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to a yellow, Shore A20 rubber. This is the softest rubber in the Poly 74-Series line of polyurethane mold rubbers. Poly 74-20 is a pourable rubber, but it can be easily thickened with PolyFiber II Thickener for brush-on application.
Mix Ratio: 1A/2B
Shore Hardness: A20
Mix Viscosity: 800cP :
Poly 74-Series Liquid Rubbers consists of two parts (A and B), which, after mixing, cure at room temperature to flexible, high-strength, mold rubbers. Poly 74-Series Rubbers make durable, easy-releasing molds for casting plasters and waxes without release agents. When Poly 74-Series molds are properly prepared, they are also excellent for casting concrete and various resins, such as epoxy, polyester, polyurethane and acrylic. Countless decorative concrete applications require liquid mold rubbers for casting, forming or texturing concrete into artful, realistic shapes and colors. Polytek® room-temperature curing polyurethane and silicone mold systems are used to make molds to produce a wide variety of precast concrete products.