Polytek

Polyurethane Mold Rubbers

polyurethane-mold-rubbersThese two-part, liquid mold rubbers 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.

Typical Uses

 

Hardnesses range from a soft Shore A20 to a very firm Shore D45.

Product Options

Pourable Polyurethane Mold Rubbers

Poly 74-Series Shore A20 to A55 hardness liquid mold rubbers. High-strength, abrasion resistant, longest-lasting molds. Economical & versatile. Popular with plaster casters, concrete precasters and art foundries.
Poly 75-Series Shore A60 to A80 hardness liquid mold rubbers. High-strength, abrasion-resistant, super-tough rubbers. Long lasting & economical. Primarily used for high production concrete casting, forming and texturing.
FormRub Series Designed to make high-performance molds that stand up to the rigors of high-production casting and forming of concrete. Shore A35 to A65 hardness mold rubbers. Low viscosity, 1A:1B mix ratios.
Poly 77-Series Shore A50 and A65 hardness liquid mold rubbers. High-strength, abrasion-resistant, high elongation rubbers. Lower viscosity compared to other rubbers at A50 & A65 hardness.
Poly 81-Series Shore A90 and D45 hardness liquid rubbers. Great for creating durable molds, mold facings, stamping tools, industrial parts, rollers, gaskets, mold shells, bumpers, pads and much more.
PolyFast 72-40 Poly-Fast 72-40 is a dense, medium hardness rubber used primarily for casting plaster, waxes and in some cases, cement. Shore Hardness: A40.
GlassRub 50 Poly GlassRub 50 liquid rubber is an easy 1A:1B mix system 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: A50.

 

Brushable Polyurethane Mold Rubbers*

Polygel® 35 Polygel 35 is a Shore A35, 1A:1B mix, brush-on, polyurethane liquid mold rubber designed for making thin, stretchy brushed molds.
Popular Mold Shell Material Poly 1512X Liquid Plastic with PolyFiber II.
*All rubbers listed under “Pourable Polyurethane Mold Rubbers” can be made “brushable” with the addition of a thickening agent, such as PolyFiber II.

 

Sprayable Polyurethane Mold Rubbers

Polygel® Spray 35 Sprayable version of Polygel® 35. Use with meter-mix spray equipment. 1A:1B mix ratio, Shore A35, 8- to 10-minute working time, 16-hour cure time.
Polygel® Spray 50 Designed for spray application using meter-mix spray equipment. 1A:1B mix ratio, Shore A50, ~5-minute working time, 16-hour demold time.
Popular Mold Shell Material Poly 1512X Liquid Plastic with PolyFiber II.
Spray Equipment Plas-Pak Spray Guns/Regulators. Available for 1A:1B and 1A:10B mixes.