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Simpact™ 60A

Simpact™ 60A vs. Smooth-Cast™ 320

Tough, Fast Setting Urethane

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Smooth-Cast™ 320

Simpact™ 60A vs. Smooth-Cast™ 320Simpact™ 60A

Off-White, Ultra Low Viscosity Liquid Plastics

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Key Differences

Product Type
  • Urethane Rubber
  • Urethane Resins
  • Urethane Resins
Mixed Viscosity1,100 cps80 cps
Pot Life4 minutes3 minutes
Cure Time48 hours10 minutes
Shore D Hardness70
Shore A Hardness60
ColorWhiteOff White
Tensile Strength990 psi3,000 psi
Elongation @ Break400 %10 %
Disclaimer
Although we do our best to ensure accuracy, Smooth-On offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained on this Compare Tool, nor suitability of the information contained herein to your particular circumstances. Smooth-On assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, the Compare Tool, or from your use (or failure to use) the information contained herein. Other useful tools include product technical bulletins and our extensive FAQ section. You can also contact our technical support team.

All Technical Data

Simpact™ 60ASmooth-Cast™ 320
Product Type
  • Urethane Rubber
  • Urethane Resins
  • Urethane Resins
Mixed Viscosity1,100 cps80 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:94B100A:90B
Pot Life4 minutes3 minutes
Handling Time2 hours
Cure Time48 hours10 minutes
Shore D Hardness70
Shore A Hardness60
Specific Gravity1.08 g/cc1.05 g/cc
Specific Volume25.7 cu. in./lb.26.4 cu. in./lb.
ColorWhiteOff White
Die C Tear Strength142 pli
Tensile Strength990 psi3,000 psi
Tensile Modulus138,000 psi
Elongation @ Break400 %10 %
100% Modulus312 psi
Compressive Strength3,650 psi
Compressive Modulus45,800 psi
Flexural Strength4,500 psi
Flexural Modulus132,000 psi
Shrinkage<.007 in. / in.0.01 in. / in.
Heat Deflection Temp140 °F

Product Description

Simpact™ 60A

Simpact™ 60A urethane is a low odor, fast-setting urethane elastomer which offers very high tear strength, impact resistance and wear resistance. Simpact™ urethanes are phthalate free, mercury free and MOCA free. Simpact™ urethanes pour easily. Working time is 4 minutes, handling time is 2 hours and full cure time is 48 hours at room temperature.

Cured rubber has exceptional performance characteristics and dimensional stability. Simpact™ urethanes can be colored with SO-Strong™, UVO™ or Ignite™ colorants. Simpact™ urethanes are suitable for making impact resistant props, prototypes and display pieces.

This material may congeal if exposed to cold temperatures. To reconstitute, Part A & B must be heated to 90°F (33°C) then thoroughly mixed to an even consistency.

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Smooth-Cast™ 320

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.).

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