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Free Form™ AIR HT

Equinox™ 40 SLOW vs. Free Form™ AIR HT

High Temperature Epoxy Dough

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Equinox™ 40 SLOW

Equinox™ 40 SLOW vs. Free Form™ AIR HTFree Form™ AIR HT

Food Safe Silicone Mold Putty

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Key Differences

Product Type
  • Epoxy Putties
  • Silicone Rubber - Platinum Cure
Mixed ViscosityDoughPutty
Pot Life150 minutes30 minutes
Cure Time16 hours5 hours
Shore D Hardness55
Shore A Hardness40
Specific Volume54.31 cu. in./lb.22.2 cu. in./lb.
ColorGreyLight Purple
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

Free Form™ AIR HTEquinox™ 40 SLOW
Product Type
  • Epoxy Putties
  • Silicone Rubber - Platinum Cure
Mixed ViscosityDoughPutty
Mix Ratio By Volume2A:1B1A:1B
Mix Ratio By Weight2A:1B1A:1B
Pot Life150 minutes30 minutes
Cure Time16 hours5 hours
Shore D Hardness55
Shore A Hardness40
Specific Gravity0.51 g/cc1.25 g/cc
Specific Volume54.31 cu. in./lb.22.2 cu. in./lb.
ColorGreyLight Purple
Die B Tear Strength140 pli
Tensile Strength520 psi
Elongation @ Break430 %
100% Modulus119 psi
Shrinkage0.001 in. / in.
Heat Deflection Temp300 °F
Heat Deflection With Post Cure400 °F

Product Description

Free Form™ AIR HT

Free Form™ AIR HT is a low density, lightweight epoxy putty that offers high temperature resistance to 300°F/149°C when cured at room temperature and 400°F/204°C when heat post cured. This is a low-odor, low shrinkage formula that is easy to use. Free Form™ AIR HT is mixed by hand with a 2A:1B by volume or weight mix ratio. It offers a long working time and cures overnight at room temperature to a hard, rigid epoxy that is very strong with modeling board-like properties. It can be sanded, shaped, drilled, tapped and CNC machined/routered.

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Equinox™ 40 SLOW

Equinox™ Silicone Putty Products are new silicone compounds (platinum catalyst) that can be easily mixed and applied by hand to a variety of surfaces. Equinox™ Putty is mixed in equal amounts (1A:1B) by volume.

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