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Ecoflex™ 5

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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EpoxAcast™ 690

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 650 + 102 Hardener

Optically Clear Casting Epoxy

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps7,000 cps280 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)N/A (gram scale required)
Pot Life1 minute90 minutes5 hours
Cure Time5 minutes4 hours24 hours
Barcol 935 Hardness93
Shore D Hardness80
Shore A Hardness5
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.25 cu. in./lb.
ColorTranslucentOff WhiteClear
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 HardenerEpoxAcast™ 690
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps7,000 cps280 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight1A:1B100A:13B100A:30B
Pot Life1 minute90 minutes5 hours
Cure Time5 minutes4 hours24 hours
Barcol 935 Hardness93
Shore D Hardness80
Shore A Hardness5
Specific Gravity1.07 g/cc1.52 g/cc1.10 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.25 cu. in./lb.
ColorTranslucentOff WhiteClear
Die B Tear Strength75 pli
Tensile Strength350 psi6,630 psi
Tensile Modulus1,503,000 psi572,000 psi
Ultimate Tensile6,000 psi
Elongation @ Break1,000 %
100% Modulus15 psi
Compressive Strength16,350 psi9,610 psi
Compressive Modulus142,600 psi91,300 psi
Flexural Strength5,890 psi10,980 psi
Flexural Modulus710,000 psi410,000 psi
Shrinkage<.001 in. / in.0.001 in. / in.0.002 in. / in.
Heat Deflection Temp129 °F115 °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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EpoxAcast™ 690

EpoxAcast™ 690 is a clear casting epoxy resin suitable for a variety of industrial and art-related projects requiring a rigid, clear finished casting. It is mixed 100A:30B by weight (gram scale required) and features a very low viscosity for easy mixing and minimal bubble entrapment. Working time is 5 hours and cure time is 24 hours at room temperature. Castings cure with negligible shrinkage and are very hard and strong. Resin can be colored with UVO™ or IGNITE™ colorants. This product is not moisture sensitive and can be used in humid environments. Recommended casting thickness maximum per layer is 3/8 in. / 0.95 cm.

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