Polytek

Poly 74-45 Liquid Rubber

poly-74-45Poly 74-45 liquid polyurethane rubber cures to a very tough, high-tear, high-elongation rubber. This product is ideal for high volume concrete and plaster casting and is a very popular option for casting decorative architectural concrete panels and accessories.

Molds made from Poly 74-45 are also used for casting plaster wax (candles & lost wax varieties) and limited resins and foams (with the proper release agent).

Poly 74-45 molds can be poured as supplied or brushed-on by mixing in Poly Fiber II thickener or Fumed Silica. Poly 74-45 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
1A:1B A45 30 min. Yellow 2,500 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: Casting “Warped” Concrete Tables in a Poly 74-45 Mold | How to Make a Travertine Panel Mold with Poly 74-45 | Pouring Concrete into Poly 74-45 Travertine Panel Mold | How to Make a Wood Panel Poly 74-45 Mold [3-Part Series] | Polytek YouTube Channel

 

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