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Ecoflex™ 5

Ecoflex™ 5 vs. URE-BOND™ II vs. EpoxAcast™ 655 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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URE-BOND™ II

Ecoflex™ 5 vs. URE-BOND™ II vs. EpoxAcast™ 655 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 655 + 102 Hardener

Flexible Urethane Adhesive

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Rubber
  • Adhesives
Mixed Viscosity13,000 cps23,000 cps5,400 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:1B
Pot Life1 minute75 minutes5 minutes
Cure Time5 minutes9 hours24 hours
Shore D Hardness90
Shore A Hardness585
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.25 cu. in./lb.
ColorTranslucentGreyAmber
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 HardenerURE-BOND™ II
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Rubber
  • Adhesives
Mixed Viscosity13,000 cps23,000 cps5,400 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:11B100A:92B
Pot Life1 minute75 minutes5 minutes
Cure Time5 minutes9 hours24 hours
Shore D Hardness90
Shore A Hardness585
Specific Gravity1.07 g/cc1.66 g/cc1.1 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.25 cu. in./lb.
ColorTranslucentGreyAmber
Die B Tear Strength75 pli
Die C Tear Strength175 pli
Tensile Strength350 psi3,400 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break1,000 %121 %
100% Modulus15 psi700 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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URE-BOND™ II

URE-BOND® II is a premium performance urethane adhesive compound that offers a strong flexible bond between many different surfaces. URE-BOND® is ideal for adhering polyurethane rubber and other polymer products to many types of substrates (such as plaster, wood, cement, stone) and non-porous materials (such as glass, hard plastics and a variety of metals). URE-BOND® II has also been used to repair torn polyurethane molds on a limited basis (with proper surface preparation). Working time is 5 minutes at room temperature (73° F / 23° C). Once mixed and applied, URE-BOND® takes about 60 minutes to cure and yields a strong, flexible bond.

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