Poly 75-79 Liquid Rubber

Poly 75-79 is a 2A:1B mix ratio, low-viscosity, liquid polyurethane mold rubber. It is used to make tough, durable molds, liners and stamps for casting, forming and texturing concrete.

This rubber has high abrasion resistance and long mold life for high volume casting operations. Often used for making decorative concrete countertops, precast architectural panels, sound barriers, fences, pavers, slabs, patio stones, retaining wall blocks and for virtually all other types of cast stone applications.

It can also be used to cast plaster, wax, and limited resins and foams with the proper release agents.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
2A:1B A80 20 min. Yellow 2,000 cP 26 in³/lb ~16 hr.
Accessories: 74/75 Part C Softener, 74/75 Part X Accelerator, PolyFiber II Thickening Agent, UV Additive, Tietex® Fabric, Poly Purge Aerosol Dry Gas


Product Literature: Technical Bulletin | Safety Data Sheets | Physical Properties Bulletin | Sealers & Release Agents Selection Guide

Video Tutorials: For 75-Series video tutorials, visit the 75-Series page or the Polytek YouTube Channel.


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