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.
Poly 74-Series Polyurethane Rubbers consist of two parts (A and B), which, after mixing, cure at room temperature to a flexible, high-strength, mould rubbers. Poly 74-Series Rubbers make durable, easy-releasing moulds for casting plasters and waxes without release agents. When Poly 74-Series moulds are properly prepared, they are also excellent for casting concrete and various resins, such as epoxy, polyester, polyurethane and acrylic.
