Poly 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.
|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.|