Polyurethane Liquid Casting Rubbers
Polytek® offers a variety of castable liquid polyurethane rubbers and flexible plastics for creating flexible rubber parts. Typical applications include prototyping, model making, art and decorative objects, production parts and tools, duplicate masters, decorative molding and millwork and special effects castings.
All Polytek® polyurethane mold rubbers can be cast; however, the product series below have physical properties (e.g., fast-setting, optical clarity) that cater to casting applications.
PT Flex Series rubbers 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 – D60). Most PT Flex products have simple, 1A:1B mix ratios and have 4 to 5-minute pour times and 2-hour demold times.
Poly Plasti-Flex is a fast-setting, slightly flexible polyurethane plastic often used to produce decorative trim molding and millwork, props, special effects castings and impact-resistant items. It can be easily drilled, machined and sanded (contains no silica). Poly Plasti-Flex has a short pour time of 3 minutes and fast demold time of ~15 minutes.
Poly GlassRub 50 is a pale, blue-clear liquid polyurethane rubber that finds use as both a mold rubber and casting rubber since it can make stunning flexible parts and art objects which are clear, colored or filled with dry fillers. Simple 1A:1B mix ratio and Shore A45-A50 hardness.