Use Polytek® urethane rubbers to make high-performance molds and parts.

Polytek® manufactures a high-quality line of two-part, room-temperature curing (RTV) polyurethane rubbers that can be poured, brushed or sprayed to make molds or flexible parts. Polyurethane mold making and casting rubbers are economical, incredibly versatile, and capture excellent detail.

Select a product line below to learn more or continue to scroll to review product line features and common applications:

Product Options


Standard Mold Making & Casting Polyurethane Rubbers

Poly 74-Series, 75-Series & 81-Series products are standard mold making and casting polyurethane rubbers. These series offer a variety of Shore Hardness options (Shore A20-D45), pour times, and demold times. Softer hardness options are in the Poly 74-Series while harder options are in the Poly 75-Series and 81-Series.


Fast-Setting Polyurethane Rubbers

PT Flex Series are fast-setting, rapid demold polyurethane systems developed specifically for prototyping and model making applications. This series offers a wide range of Shore Hardness options (A20 – A85). Most PT Flex products have simple, 1A:1B mix ratios and have 4 to 5-minute pour times and 2-hour demold times.


Brush-On & Spray Polyurethane Rubbers

Polygel® Series mold rubbers are self-thickening and ideal for making thin blanket molds of any size. Brushable and sprayable options available.

Product Line Features

  • Type: Two-part polyurethane rubbers
  • Room temperature curing (RTV)
  • Shore A20 to D45 hardness options
  • High-strength, abrasion-resistant, long lasting molds and parts
  • Pourable, brushable and sprayable options
  • Polyurethane molds are most often used to cast concrete, plaster, wax and polyurethane, polyester, and epoxy resin (release agent required in many cases)

Application Examples

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