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Ecoflex™ 5

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

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Ecoflex™ 5 vs. Shell Shock® SLOW vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Resins
Mixed Viscosity13,000 cps7,000 cps3,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:4B
Pot Life1 minute90 minutes8 minutes
Cure Time5 minutes4 hours5 hours
Barcol 935 Hardness93
Shore D Hardness85
Shore A Hardness5
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.17.3 cu. in./lb.
ColorTranslucentOff WhiteBeige
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 HardenerShell Shock® SLOW
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Resins
Mixed Viscosity13,000 cps7,000 cps3,000 cps
Mix Ratio By Volume1A:1B1A:4B
Mix Ratio By Weight1A:1B100A:13B1A:5B
Pot Life1 minute90 minutes8 minutes
Cure Time5 minutes4 hours5 hours
Barcol 935 Hardness93
Shore D Hardness85
Shore A Hardness5
Specific Gravity1.07 g/cc1.52 g/cc1.60 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.17.3 cu. in./lb.
ColorTranslucentOff WhiteBeige
Die B Tear Strength75 pli
Tensile Strength350 psi3,100 psi
Tensile Modulus1,503,000 psi435,000 psi
Ultimate Tensile6,000 psi
Elongation @ Break1,000 %0.4 %
100% Modulus15 psi
Compressive Strength16,350 psi9,000 psi
Compressive Modulus142,600 psi500,000 psi
Flexural Strength5,890 psi7,150 psi
Flexural Modulus710,000 psi980,000 psi
Shrinkage<.001 in. / in.0.001 in. / in.0.0006 in. / in.
Heat Deflection Temp129 °F135 °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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Shell Shock® SLOW

Shell Shock® SLOW 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.

Shell Shock® plastics are ideal for making fast, lightweight rigid molds for creating silicone appliances and effects (use as a replacement for ‘stone molds’). You can also brush a “gel coat” into a rubber mold and back it up with rigid foam, creating a highly detailed lightweight casting. These products can also be brushed onto styrofoam (polystyrol) as an impact resistant coating that can be sanded, primed and painted (minimum 3 coats recommended). Shell Shock® plastics can also be used to make rigid support shells for brush on rubber molds.

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