Smooth-On Smooth-Cast 320 Series Urethane Resin Kit Off-White
The Smooth-Cast 320 Series consists of ultra-low viscosity casting resins that yield virtually bubble-free off-white castings. The Smooth-Cast 320 resins are sister products to our popular Smooth-Cast 300 Series of bright white plastics, but are easier to color using SO-Strong or Ignite color tints. Smooth-Cast 320 series is easy to mix and pour, offering the convenience of a 1A:1B by volume or 100A : 90B by weight mix ratio.
The Smooth-Cast 320 Series resins readily accept pigments and fillers (such as URE-FIL 3, 5 and 7 from Smooth-On). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast 320 Series resins include reproducing small to medium size sculptures, making prototype models, special effect props, decorative jewelry and taxidermy (bones, antlers, teeth etc.).
Mix Ratio By Volume: 1A:1B
Mix Ratio By Weight: 100A:90B
Pot Life: 3 Minutes
Cure Time: 10 Minutes
Shore Hardness: 70 D
Specific Gravity: 1.05 g/cc
Specific Volume: 26.4 cu. in./lb
Tensile Strength: 3,000psi
Elongation @ Break: 10%
Compressive Modulus: 45,800psi
Tensile Modulus: 138,000psi
Flexural Strength: 4,500psi
Flexural Modulus: 132,000psi
Compressive Strength: 3,650psi
Heat Deflection Temp: 140 F
Color: Off White
Shrinkage: <.01in. / in.
Mixed Viscosity: 80 cps