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Free Form™ AIR HT

Plasti-Paste™ EPOXY vs. Free Form™ AIR HT

High Temperature Epoxy Dough

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Key Differences

Product Type
  • Epoxy Putties
  • Epoxy Casting and Laminating Resins
Mixed ViscosityDoughPaste
Pot Life150 minutes40 minutes
Shore D Hardness5580
Specific Volume54.31 cu. in./lb.27.73 cu. in./lb.
ColorGreyOff-White
Heat Deflection Temp300 °F160 °F
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 HTPlasti-Paste™ EPOXY
Product Type
  • Epoxy Putties
  • Epoxy Casting and Laminating Resins
Mixed ViscosityDoughPaste
Mix Ratio By Volume2A:1B2A:1B
Mix Ratio By Weight2A:1B2A:1B
Pot Life150 minutes40 minutes
Thin Film Recoat Time60 minutes
Cure Time16 hours16 hours
Shore D Hardness5580
Specific Gravity0.51 g/cc1.0 g/cc
Specific Volume54.31 cu. in./lb.27.73 cu. in./lb.
ColorGreyOff-White
Tensile Modulus470,000 psi
Ultimate Tensile3,320 psi
Elongation @ Break0.83 %
Compressive Strength7,700 psi
Compressive Modulus138,000 psi
Flexural Strength9,186 psi
Flexural Modulus2,273,000 psi
Shrinkage0.001 in. / in.
Heat Deflection Temp300 °F160 °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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Plasti-Paste™ EPOXY

Plasti-Paste™ EPOXY is an epoxy-based version of Smooth-On’s popular urethane Plasti-Paste™ products. It is a two component, fiber-filled epoxy designed for vertical surface application. Part A is a paste and Part B is a liquid. Mix ratio is 2A: 1B by volume or weight. Pot life is 40 minutes and cure time is 16 hours at room temperature depending on mass. Applying heat can reduce cure time. Mixed material holds a vertical surface without sagging and cures very rigid and strong.

Liquid material can be colored with UVO™ colorants and cured epoxy can be sanded, machined and painted with acrylic enamel paints. This plastic can used as a support shell or mother mold material to reinforce rubber molds during casting. It can also be used for creating themed environments, creating art or special effects. This epoxy is also a powerful adhesive and can be used as a repair material for a variety of industrial applications.

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