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Poly 74-30 Clear is a transparent version of Poly 74-30 that is useful for molds that need to be cut after cure or where transparency is important. It is also useful for molds where clarity is needed to see casting material fill the cavity. This liquid polyurethane rubber can also be used for casting clear amber or color-cast flexible art objects and décor.
Poly 74-30 Clear is designed for making 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). It is widely used by foundries for wax.
This liquid rubber can be poured as supplied or brushed-on by mixing in Poly Fiber II thickener orFumed Silica. This 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 A30 25-30 min. Transparent Amber/Varies 2,000 cP 27.5 in³/lb ~16 hr.