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Poly 74-45 Mold Rubber by POLYTEK. 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.
Casting techniques using Polytek mold rubber
Casting techniques - Stamp Mat. 74-45 could also have been used for this project.
Reproducing a Concrete Countertop.
Allow rubber to cure at room temperature, 77°F (25°C). Carefully demold
after approximately 16 hours. Final cure properties are obtained in about
seven days, but molds may be used with care after curing for 24-48 hours.
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Description
Polyurethane rubber is designed for making high-performance rubber molds for casting materials such as plaster (millwork, home décor, etc.), wax (candles & lost wax varieties), concrete, GFRC, GRG and resins.
- Polyurethane rubber consists of two parts (A & B), which, after mixing, cure at room temperature to a flexible, high-strength mold rubber.
- Polyurethane rubber can be used to produce durable, easily released molds for casting concrete, plaster and wax.
- Mix Ratio (by Weight): 1A:1B
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Hardness (Shore A): 45
- Pour Time 30 min.
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Color: Yellow
Mixed
- Viscosity (cP): 2,500
- Specific Volume (in3/lb): 27
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Recommended Release Agent: Pol-Ease 2300
- Demold time 16 hrs
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