Polytek

Poly 74-44 Liquid Rubber

Poly 74-44 is a 2A:1B mix, A45-A48 hardness, liquid polyurethane rubber that can be demolded after ~16 hours. This rubber has high elongation and tear strength properties.

It is designed for making high-performance rubber molds for casting materials such as plaster (millwork, home décor, etc.), wax (candles & lost wax varieties), concrete, GFRC, GRG and resins (polyurethane, polyester, epoxy – with proper release agents).

This rubber can be poured as supplied or may be thickened with PolyFiber II or Fumed Silica for brush-on application. Poly 74-44 liquid rubber is an excellent multi-purpose, economical mold material that will provide long mold life, durability and consistent performance under repeated casting.

 

Specifications:

Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
2A:1B A45 20 min. Gray 3,500 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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