Polytek

Poly 74-29 Liquid Rubber

poly-74-29Poly 74-29 is a 1A:1B mix, A30-A32 hardness, liquid polyurethane rubber that can be demolded in ~16 hours. This rubber is available in a black or white color. Molds made with Poly 74-29 exhibit high strength and high elongation properties. They are well-suited for casting materials such as concrete, plaster (for millwork, home décor, etc.), wax (candles & lost wax varieties) and resins (polyurethane, polyester, epoxy – with proper release agents).

Poly 74-29 molds can be poured as supplied or brushed-on by mixing in Poly Fiber II thickener. For brush-on application, 74/75 Part X accelerator can be used to speed the process. Poly 74-29 liquid rubber is an excellent multi-purpose, economical mold material that will provide long mold life, durability and consistent performance under high volume casting applications.

Specifications:

Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:1B A30 30 min. White or Black 2,800 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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