Description
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.
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. |
