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Ecoflex™ 5

Ecoflex™ 5 vs. Body Double™ SILK vs. EpoxAcast™ 650 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Ecoflex™ 5 vs. Body Double™ SILK vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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Body Double™ SILK

Ecoflex™ 5 vs. Body Double™ SILK vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 650 + 102 Hardener

Self-Releasing Lifecasting Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
  • Lifecasting Materials
Mixed Viscosity13,000 cps7,000 cpsBrushable
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:1B
Pot Life1 minute90 minutes6 minutes
Cure Time5 minutes4 hours20 minutes
Barcol 935 Hardness93
Shore A Hardness525
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.30.4 cu. in./lb.
ColorTranslucentOff WhiteGreen
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 HardenerBody Double™ SILK
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
  • Lifecasting Materials
Mixed Viscosity13,000 cps7,000 cpsBrushable
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:13B1A:1B
Pot Life1 minute90 minutes6 minutes
Cure Time5 minutes4 hours20 minutes
Barcol 935 Hardness93
Shore A Hardness525
Specific Gravity1.07 g/cc1.52 g/cc0.91 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.30.4 cu. in./lb.
ColorTranslucentOff WhiteGreen
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.<.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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Body Double™ SILK

Body Double™ SILK is a self-releasing platinum-cure silicone rubber that can be applied directly to the skin to make molds of the face, hands and other body parts. The rubber cures quickly and will reproduce excellent detail from any original model. Certified Skin Safe - Material is skin safe and certified by an independent laboratory. 

Body Double™ SILK will release from closely cropped hair-covered skin surfaces(short beards, mustaches, eyebrows, pubic hair, etc.). Release cream or Hyperfolic are not needed when using Body Double™ SILK. Body Double™ SILK will last for many castings of almost any material including plaster, Matrix™ Neo™, wax, resins (Smooth-Cast urethanes, polyester, etc.) Body Double™ SILK has a working time of 6 minutes and a demold time of 20 minutes*.

*Depending on material temperature, ambient temperature and body temperature – see “Preparation” below for details.

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