Poly 74-55 Liquid Rubber

poly-74-55At Shore A55, Poly 74-55 liquid polyurethane rubber cures to the firmest rubber in the 74-Series (view 75-Series rubbers for harder options). It also has the highest tensile and tear strength in the series.

Molds made with Poly 74-55 are widely used for dimensionally stable plaster castings and are also used for concrete, wax, plaster, and limited resin castings as well.

Poly 74-55 liquid rubber can be poured as supplied or can be thickened with Poly Fiber II for creating brush-on molds.



Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
4A:1B A55 15 min. Amber 4,000 cP 27.5 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 | Sealer & Release Agent Selection Guide

Video Tutorials: For 74-Series video tutorials, visit the 74-Series page or the Polytek YouTube Channel.


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