Smooth-Cast™ 300 Series

Create detailed castings with Smooth-On low-viscosity urethane resins designed for fast, accurate reproduction work. The Smooth-Cast™ 300 Series includes bright white and mineral-filled options with different pot lives, cure times and hardness levels. These resins are ideal for prototypes, models, props, decorative castings, production parts and applications where clean detail and reliable casting performance are needed.
Available in Smooth-Cast™ 300 Series
Product Cure Time Specific Gravity Specific Volume Color Tensile Strength Tensile Modulus Compressive Strength Compressive Modulus Flexural Strength Shrinkage Heat Deflection Temp Elongation At Break Flexural Modulus Mixed Viscocity Mix Ratio By Volume Mix Ratio By Weight Pot Life Shore D Hardness Color Mixed Viscocity Cure Time Pot Life Flexural Strength Flexural Modulus Specific Volume Specific Gravity Mix Ratio By Weight Shrinkage Mix Ratio By Volume Tensile Strength Elongation At Break Shore D Hardness Heat Deflection Temp Compressive Strength Tensile Modulus Compressive Modulus
Smooth-Cast™ 300Q 5 min. 1.05 g/cc 26.4 cu. in./lb. White 3,000 psi 139,500 psi 4,000 psi 45,800 psi 4,510 psi 0.01 in. / in. 120 °F 5 % 128,000 psi 80 cps 1A:1B 100A:90B 30 sec. 70 White 80 cps 5 min. 30 sec. 4,510 psi 128,000 psi 26.4 cu. in./lb. 1.05 g/cc 100A:90B 0.01 in. / in. 1A:1B 3,000 psi 5 % 70 120 °F 4,000 psi 139,500 psi 45,800 psi
Smooth-Cast™ 300 10 min. 1.05 g/cc 26.4 cu. in./lb. White 3,000 psi 139,500 psi 4,000 psi 45,800 psi 4,510 psi 0.01 in. / in. 120 °F 5 % 128,000 psi 80 cps 1A:1B 100A:90B 3 min. 70 White 80 cps 10 min. 3 min. 4,510 psi 128,000 psi 26.4 cu. in./lb. 1.05 g/cc 100A:90B 0.01 in. / in. 1A:1B 3,000 psi 5 % 70 120 °F 4,000 psi 139,500 psi 45,800 psi
Smooth-Cast™ 305 30 min. 1.05 g/cc 26.4 cu. in./lb. White 3,000 psi 134,000 psi 3,800 psi 44,900 psi 4,000 psi 0.0065 in. / in. 120 °F 7.5 % 118,000 psi 80 cps 1A:1B 100A:90B 7 min. 70 White 80 cps 30 min. 7 min. 4,000 psi 118,000 psi 26.4 cu. in./lb. 1.05 g/cc 100A:90B 0.0065 in. / in. 1A:1B 3,000 psi 7.5 % 70 120 °F 3,800 psi 134,000 psi 44,900 psi
Smooth-Cast™ 310 4 h. 1.05 g/cc 26.4 cu. in./lb. White 3,000 psi 134,000 psi 3,800 psi 44,900 psi 4,000 psi 0.0065 in. / in. 120 °F 7.5 % 118,000 psi 80 cps 1A:1B 100A:90B 20 min. 70 White 80 cps 4 h. 20 min. 4,000 psi 118,000 psi 26.4 cu. in./lb. 1.05 g/cc 100A:90B 0.0065 in. / in. 1A:1B 3,000 psi 7.5 % 70 120 °F 3,800 psi 134,000 psi 44,900 psi
Smooth-Cast™ 385 2 h. 1.60 g/cc 17.3 cu. in./lb. Beige 3,100 psi 400,000 psi 8,500 psi 400,000 psi 5,900 psi 0.0006 in. / in. 135 °F 1 % 433,000 psi 3,000 cps - 1A:5B 20 min. 85 Beige 3,000 cps 2 h. 20 min. 5,900 psi 433,000 psi 17.3 cu. in./lb. 1.60 g/cc 1A:5B 0.0006 in. / in. - 3,100 psi 1 % 85 135 °F 8,500 psi 400,000 psi 400,000 psi

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