Poly 74-30 Gallon Kit (16 Lbs)
Poly 74-30 is a 1A:1B mix, A~30 hardness polyurethane liquid rubber that cures in 16-24 hours. Can be poured as supplied, or thickened using Poly Fiber II to make into a brushable paste for brush-on molds.
Poly 74-30 is designed for making durable, high-performance, rubber molds for casting materials such as plaster (millwork, home décor, etc.), wax (candles & lost wax varieties), concrete and resins (polyurethane, polyester, epoxy - with proper release agents). Poly 74-30 liquid rubber is an excellent multi-purpose, economical mold material that will provide long mold life, durability and consistent performance under repeated casting.
Widely used by foundries for waxes.
Mask, creature and costume makers: this is your mold material for casting PlatSil Gel 10 Silicone - will not inhibit the cure! Great Detail.
Mix Ratio: 1A:1B By Weight
Working Time: 25-30 Minutes
Demold Time: Overnight
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