Polyurethane Mold Rubbers
Polytek® manufactures a high-quality line of two-part, liquid mold rubbers that can be poured, brushed or sprayed to make molds that cure at room temperature. They are the most versatile, easy-to-use and cost-effective mold materials available.
These systems are used across a wide variety of industries, including Precast Concrete, Sculpture & Foundry, Prop Making & Special Effects, Plaster Millwork & Ornamentation, Industrial Applications, Theming & Scenic Design, Prototyping, various Craft & Hobby projects, and many more.
Polytek® polyurethane mold rubbers are categorized into eight series. Select a series below for more information:
Poly 74-Series mold rubbers are used to make high-strength, abrasion resistant, long-lasting molds. Economical & versatile. Popular with plaster casters, concrete precasters and art foundries, but also used for a variety of additional industrial, artistic and commercial applications.
Shore Hardness Range: A20 to A55
Poly 75-Series mold rubbers are high-strength, abrasion-resistant, long lasting and economical. Primarily used for high production concrete casting, forming and texturing, but useful for a variety of additional industrial, artistic and commercial applications.
Shore Hardness Range: A60 to A80
Polygel® Series mold rubbers are self-thickening and ideal for making thin blanket molds of any size. Brushable and sprayable options available.
Shore Hardness Range: A35 & A50 Options
FormRub Series rubbers are designed to make high-performance molds that stand up to the rigors of high-production casting and forming of concrete. Low viscosity, 1A:1B mix ratios.
Shore Hardness Range: A35 to A65
Poly 81-Series rubbers are great for creating durable molds, mold facings, stamping tools, industrial parts, rollers, gaskets, mold shells, bumpers, pads and much more.
Shore Hardness Range: A90 & D45 Options
Poly GlassRub 50 liquid rubber is designed for making clear molds that can be cut away from a master with less chance of damage and better seam positioning since objects are visible through the rubber.
Shore Hardness Range: A50
Poly 77-Series mold rubbers are high-strength, abrasion-resistant, and feature high elongation properties. They are low in viscosity compared to other rubbers of the same hardness.
Shore Hardness: A50
Poly-Fast 72-40 is a dense, medium hardness rubber used primarily for casting plaster, waxes and in some cases, concrete. Unlike other polyurethane rubbers, this system offers a liquid thickener accessory.
Shore Hardness Range: A40