Poly 77-65 Liquid Rubber

Poly 77-65 is a mid-range to firm hardness, 1:1 mix, liquid polyurethane mold rubber that can be used for many general mold making purposes, but is widely used for cast concrete applications such as manufacturing of concrete pavers and other cast stone elements. It is also useful for making flexible concrete stamping/imprinting tools and texturing skins.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:1B A65 15 min. Tan 1,600 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


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