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Simpact™ 60A

Mold Max™ XLS™ II vs. Simpact™ 60A

Tough, Fast Setting Urethane

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Mold Max™ XLS™ II

Mold Max™ XLS™ II vs. Simpact™ 60ASimpact™ 60A

eXtra Low-Shrinkage Silicone Mold Rubber

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Key Differences

Product Type
  • Urethane Rubber
  • Urethane Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity1,100 cps30,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)
Pot Life4 minutes40 minutes
Cure Time48 hours24 hours
Shore A Hardness6030
ColorWhiteBlue
Tensile Strength990 psi550 psi
100% Modulus312 psi95 psi
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™ 60AMold Max™ XLS™ II
Product Type
  • Urethane Rubber
  • Urethane Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity1,100 cps30,000 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight100A:94B100A:10B
Pot Life4 minutes40 minutes
Handling Time2 hours
Cure Time48 hours24 hours
Shore A Hardness6030
Specific Gravity1.08 g/cc1.22 g/cc
Specific Volume25.7 cu. in./lb.22.7 cu. in./lb.
ColorWhiteBlue
Die B Tear Strength110 pli
Die C Tear Strength142 pli
Tensile Strength990 psi550 psi
Elongation @ Break400 %375 %
100% Modulus312 psi95 psi
Shrinkage<.007 in. / in.0.001 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)400 °F
Dielectric Constant, 100Hz3.4
Dielectric Strength>360 volts/mil
Dissipation Factor, 100Hz0.002
Thermal Conductivity0.24 W/M*K
Volume Resistivity9.000000E+15 ohm/cm

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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Mold Max™ XLS™ II

Mold Max™ XLS™ II is a Shore 30A tin-catalyzed silicone mold rubber that exhibits very low long-term shrinkage. XLS™ II molds last longer than other silicones in production when casting chemically harsh resins such as epoxies and polyesters as well as urethane foams.

Mix ratio is 100A:10B by weight. Pot life is 40 minutes and cure time is 24 hours at room temperature. Mold Max™ XLS™ II silicone will reproduce the finest detail and is suitable for a variety of industrial and art related applications including making production molds for, reproducing prototypes, furniture, sculpture and architectural elements. Mold Max™ XLS™ II can be thickened with THI‑VEX™ additive for brush-on applications.

Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.

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