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Ecoflex™ 5

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. Epsilon™ PRO

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. Epsilon™ PROEcoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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EpoxAcast™ 690

EpoxAcast™ 690 vs. Ecoflex™ 5 vs. Epsilon™ PROEcoflex™ 5 versus Epsilon™ PRO

Optically Clear Casting Epoxy

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps4,000 cps280 cps
Mix Ratio By Volume1A:1B2A:1BN/A (gram scale required)
Pot Life1 minute22 minutes5 hours
Cure Time5 minutes16 hours24 hours
Shore D Hardness6580
Shore A Hardness5
ColorTranslucentClear AmberClear
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™ 5Epsilon™ PROEpoxAcast™ 690
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps4,000 cps280 cps
Mix Ratio By Volume1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:44B100A:30B
Pot Life1 minute22 minutes5 hours
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours
Cure Time5 minutes16 hours24 hours
Shore D Hardness6580
Shore A Hardness5
Specific Gravity1.07 g/cc1.11 g/cc1.10 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.25 cu. in./lb.
ColorTranslucentClear AmberClear
Die B Tear Strength75 pli
Tensile Strength350 psi6,630 psi
Tensile Modulus572,000 psi
Elongation @ Break1,000 %
100% Modulus15 psi
Compressive Strength9,610 psi
Compressive Modulus91,300 psi
Flexural Strength10,980 psi
Flexural Modulus410,000 psi
Shrinkage<.001 in. / in.0.002 in. / in.
Heat Deflection Temp115 °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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Epsilon™ PRO

Epsilon™ PRO is a thixotropic epoxy coating that self-thickens for brushing onto a variety of surfaces.  Compared to original Epsilon™, Epsilon™ PRO offers a longer working time and cured epoxy is semi-rigid, offering better impact resistance.  Mix ratio for Epsilon™ PRO is 2A:1B by volume (100A:44B by weight).  A gram scale is not needed to use this product.

Applied in thin layers, mixed material holds a vertical surface without sagging or slumping. Material wets out uniformly over different surfaces.  Pot life is 22 minutes, with a re-coat time of 3 hours.  All layers should be allowed to cure for 16 hours at 73° F / 23° C and can be accelerated with mild heat.  Epsilon™ PRO is clear and can be easily colored using Ignite™ or UVO™ colorants.  Cured coating has a gloss finish and can be sanded, primed and painted.

Applications: Epsilon™ PRO is suitable for use as a protective, impact resistant coating for EPS or polyurethane foam. It can also be applied to plaster, concrete, wood and fabrics. This product is not sensitive to moisture / humidity and contains no VOC’s. 

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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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