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Ecoflex™ 5

Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 Hardener vs. FlexFoam-iT!™ 15 Tuff Stuff

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 Hardener vs. FlexFoam-iT!™ 15 Tuff StuffEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Mix and Pour Expanding Foams
Mixed Viscosity13,000 cps7,000 cps1,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:2B
Pot Life1 minute90 minutes2 minutes
Cure Time5 minutes4 hours4 hours
Barcol 935 Hardness93
Shore A Hardness5
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.115 cu. in./lb.
ColorTranslucentOff WhiteWhite
Disclaimer
Although we do our best to ensure the accuracy of this Compare Tool, Smooth-On offers no warranty either expressed or implied as to the reliability of the information contained herein. Smooth-On assumes no liability for loss or damage associated with use of the Compare Tool. If this is a critical project, we encourage you to review all of the technical data below and contact our Technical Service department with any questions or concerns.

All Technical Data

Ecoflex™ 5EpoxAcast™ 650 + 102 HardenerFlexFoam-iT!™ 15 Tuff Stuff
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Mix and Pour Expanding Foams
Mixed Viscosity13,000 cps7,000 cps1,000 cps
Mix Ratio By Volume1A:1B1A:2B
Mix Ratio By Weight1A:1B100A:13B100A:185B
Pot Life1 minute90 minutes2 minutes
Handling Time90 minutes
Cure Time5 minutes4 hours4 hours
Barcol 935 Hardness93
Shore A Hardness5
Expansion (approximate)4 times
Foam Density15 lb/ft³
Specific Gravity1.07 g/cc1.52 g/cc0.24 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.115 cu. in./lb.
ColorTranslucentOff WhiteWhite
Die B Tear Strength75 pli
Tensile Strength350 psi
Tensile Modulus1,503,000 psi
Ultimate Tensile6,000 psi
Elongation @ Break1,000 %
100% Modulus15 psi
Compressive Strength16,350 psi
Compressive Modulus142,600 psi
Flexural Strength5,890 psi
Flexural Modulus710,000 psi
Shrinkage<.001 in. / in.0.001 in. / in.
Heat Deflection Temp129 °F
Useful Temperature (min)-65 °F
Useful Temperature (max)450 °F

Product Description

Ecoflex™ 5

Ecoflex™ rubbers are platinum-catalyzed silicones that are versatile and easy to use. Ecoflex™ rubbers are mixed 1A:1B by weight or volume and cured at room temperature with negligible shrinkage.  Low viscosity ensures easy mixing and de-airing. Dispense using our convenient dispensing cartridges. Cured rubber is very soft, very strong and very “stretchy”, stretching many times its original size without tearing and will rebound to its original form without distortion.

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EpoxAcast™ 650 + 102 Hardener

EpoxAcast™ 650 is a mineral filled general purpose casting epoxy that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment.

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FlexFoam-iT!™ 15 Tuff Stuff

FlexFoam-iT!™ Series foams are premium quality water blown flexible foams that can be used for a variety of industrial, special effects and art & crafts and projects. With several to choose from, uses include making theatrical props (swords, knives, hammers, etc.), industrial gaskets, custom padding and cushioning, and more. FlexFoam-iT!™ foams are also used as repair materials for seats, cushions and archery targets. SO-Strong™ colorants can be added for color effects.

Part A and B liquids are combined, mixed and poured into a mold or other form (apply release agent if necessary). Mixture will rise and cure quickly to a solid, flexible foam. Foams vary by density and offer good physical properties. The lower the number, the more the foam expands.

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