Polytek 74-30HT Polyurethane Liquid Mold Rubber
Poly 74-30 HT (high tear) Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to an amber (color varies), Shore A30 rubber. This is the high-tear version of Poly 74-30 Liquid Rubber. Poly 74-30 HT 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: A30
Cured Color: Amber / Varies
Mixed Viscosity: 2000cP
Shake or stir 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. For additional physical property specifications, refer to the Physical Properties Bulletin
This mold rubber is the industry standard for sculpture and foundry applications. This pourable rubber can easily be thickened with PolyFiber II for Fumed Silica for brush-on application when desired. Poly 74-Series Liquid Rubbers consist of two parts (A and B), which, after mixing, cure at room temperature to fl exible, 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.