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Silicone Rubber PERFECT FOR ART AND INDUSTRIAL APPLICATIONS Often used for molds to reproduce sculptures and other prototypes, casting plaster, POP,resins, and wax LOW VISCOSITY You can easily mix and pour this rubber compound, creating one-block or two-block pieces or replicas with no vacuum degassing required. 1 Appearance : white 2 Mixing proportion of curing agent : 3-5% 3 Operating time (@ 25 °C ) : 15-30 Min 4 Curing time (@ 25 °C ) : 4-6 hrs Hardness : 10 A° 6 Density : 1.08 g/cm3 7 Viscosity (@ 25 °C ) :7000±1000 cps 8 Tensile-strength : ?26 kgf /cm2 9 Tear-strength : ?16 kgf /cm 10 Elongation-break : ? 450 %