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Ecoflex™ 5

Ecoflex™ 5 vs. Shell Shock™ FAST vs. EpoxAcast™ 650 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Ecoflex™ 5 vs. Shell Shock™ FAST vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5 versus Shell Shock™ FAST

Mineral Filled General Purpose Casting Epoxy Resin

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps3,000 cps7,000 cps
Mix Ratio By Volume1A:1B1A:4BN/A (gram scale required)
Pot Life1 minute3 minutes90 minutes
Cure Time5 minutes60 minutes4 hours
Barcol 935 Hardness93
Shore D Hardness85
Shore A Hardness5
Specific Volume25.8 cu. in./lb.17.3 cu. in./lb.18.22 cu. in./lb.
ColorTranslucentBeigeOff White
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

Ecoflex™ 5Shell Shock™ FASTEpoxAcast™ 650 + 102 Hardener
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps3,000 cps7,000 cps
Mix Ratio By Volume1A:1B1A:4B
Mix Ratio By Weight1A:1B1A:5B100A:13B
Pot Life1 minute3 minutes90 minutes
Cure Time5 minutes60 minutes4 hours
Barcol 935 Hardness93
Shore D Hardness85
Shore A Hardness5
Specific Gravity1.07 g/cc1.60 g/cc1.52 g/cc
Specific Volume25.8 cu. in./lb.17.3 cu. in./lb.18.22 cu. in./lb.
ColorTranslucentBeigeOff White
Die B Tear Strength75 pli
Tensile Strength350 psi3,100 psi
Tensile Modulus435,000 psi1,503,000 psi
Ultimate Tensile6,000 psi
Tensile Elongation0.42 %
Elongation @ Break1,000 %0.4 %
100% Modulus15 psi
Compressive Strength9,000 psi16,350 psi
Compressive Modulus500,000 psi142,600 psi
Flexural Strength7,150 psi5,890 psi
Flexural Modulus980,000 psi710,000 psi
Shrinkage<.001 in. / in.0.0006 in. / in.0.001 in. / in.
Heat Deflection Temp135 °F129 °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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Shell Shock™ FAST

Shell Shock™ FAST is a thixotropic plastic that self thickens when mixed and can be brushed onto a variety of surfaces or into rubber molds. When Parts A and B are mixed in proper proportion (1A:4B by volume or 1A:5B by weight), material cures at room temperature with virtually no shrinkage to a hard, durable plastic that exhibits good compressive and flexural strength. Fully cured castings are rigid and can be sanded, primed and painted. Color effects are possible by adding SO-Strong™ Color Tints.

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EpoxAcast™ 650 + 102 Hardener

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

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