This polyurethane rubber consists of two parts (A & B), which, after mixing, cure at room temperature to flexible, high-strength mold rubber. It can be used to produce durable, easily releasing molds for casting concrete, plaster and wax.
Mix Ratio (by Weight): 1A:1B
Hardness (Shore A): 60
Pour Time (min): 10
Color: Amber
Mixed Viscosity (cP): 1,200
Specific Volume (in3/lb): 27
Shrinkage Upon Cure: Nil
Recommended Release Agent: Pol-Ease 2300
See product demo in Tools+Tips with Fu-Tung Cheng: