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Ecoflex™ 5

Ecoflex™ 5 vs. FlexFoam-iT!™ IV Tuff Stuff vs. EpoxAcast™ 655 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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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 cps23,000 cps1,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)N/A
Pot Life1 minute75 minutes30 seconds
Cure Time5 minutes9 hours2 hours
Shore D Hardness90
Shore A Hardness5
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.420 cu. in./lb.
ColorTranslucentGreyWhite
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™ 655 + 102 HardenerFlexFoam-iT!™ IV Tuff Stuff
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Mix and Pour Expanding Foams
Mixed Viscosity13,000 cps23,000 cps1,000 cps
Mix Ratio By Volume1A:1BN/A
Mix Ratio By Weight1A:1B100A:11B80A:100B
Pot Life1 minute75 minutes30 seconds
Tack Free Time2 hours
Cure Time5 minutes9 hours2 hours
Shore D Hardness90
Shore A Hardness5
Expansion (approximate)13 times
Foam Density4 lb/ft³
Specific Gravity1.07 g/cc1.66 g/cc0.06 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.420 cu. in./lb.
ColorTranslucentGreyWhite
Die B Tear Strength75 pli
Tensile Strength350 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break1,000 %
100% Modulus15 psi
Compressive Strength12,500 psi
Compressive Modulus125,500 psi
Flexural Strength7,660 psi
Flexural Modulus1,403,000 psi
Shrinkage<.001 in. / in.0.0006 in. / in.
Heat Deflection Temp135 °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™ 655 + 102 Hardener

EpoxAcast655 (formerly Metalset™ A-30) is a versatile aluminum filled castable epoxy that is very hard and strong. It is dimensionally stable, even when mass cast up to 512 in3 / 8,390 cm3.

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FlexFoam-iT!™ IV 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. SO-Strong™, UVO™ or IGNITE™ 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.

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