Polytek

Pourable Polyurethane Mold Rubbers

pourable-polyurethane-mold-rubbersThese polyurethane mold rubbers span the range of very soft (A20) to very firm (D45) rubbers which, when mixed as supplied, can be used to create a multitude of poured molds and flexible parts.

These two-part liquid rubbers are excellent choices for making molds for casting concrete, plaster, wax as well as for limited resin and foam casting applications.

The Poly 74-Series rubbers are soft to mid-range hardness rubbers (A20-A55) and can also be thickened with Fumed Silica or Poly Fiber II to create brushed molds.

Poly 75 & 77-Series rubbers are mid-range to firm rubbers (A60-A90) and Poly 81-Series systems are even firmer (A90 to D45).

FormRub Series rubbers were specifically designed to make molds that meet the demands of high-production casting and forming of concrete.

PolyFast 72-40a medium-hardness rubber, can be thickened with a liquid thickener for brush-on mold applications.

GlassRub 50 is a clear specialty rubber used for cut molds where clarity is important or for casting clear art objects & decor.

Pourable Polyurethane Mold Rubber Series

Poly 74-Series Shore A20 to A55 hardness liquid mold rubbers. High-strength, abrasion resistant, longest lasting molds. Economical & versatile.
Poly 75-Series Shore A60 to A80 hardness liquid mold rubbers. High-strength, abrasion-resistant, super-tough rubbers. Lng lasting & economical.
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 mods, 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. Can be thickened with a liquid additive. 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.

 

Video Tutorials

This video tutorial features the making of a Poly 74-20 (in the 74-Series) poured block mold:

 

This video tutorial features the making of a concrete stamping mat using Poly 75-80 (in the 75-Series):

 

Other Pourable Polyurethane Rubber Tutorials on the Polytek YouTube Channel: