Smooth-On Smooth-Cast 300, 10 Gallon Set

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The Smooth-Cast™ 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. These resins readily accept fillers and can be colored with urethane tints or pigments (Smooth-Cast™ 325 series accepts pigments better than the Smooth Cast™ 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast™ 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.

Those interested in making roto cast pieces should refer to the Smooth-Cast™ 65D technical bulletin.

Data At-A-Glance

Mix Ratio By Volume 1A:1B
Mix Ratio By Weight 100A:90B
Pot Life 3 minutes
Cure Time 10 minutes
Shore Hardness 70 D
Color White
Tensile Strength 3,000 psi
Elongation @ Break 5 %
Compressive Modulus 45,800 psi
Specific Gravity 1.05 g/cc
Specific Volume 26.4 cu. in./lb.
Tensile Modulus 139,500 psi
Flexural Strength 4,510 psi
Flexural Modulus 128,000 psi
Compressive Strength 4,000 psi
Heat Deflection Temp 120 °F
Shrinkage 0.01 in. / in.
Mixed Viscosity 80 cps

    More Prop 65 Info