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Ecoflex™ 5

Ecoflex™ 5 vs. Epsilon™ PRO vs. Plasti-Paste™ EPOXY

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

Ecoflex™ 5 vs. Epsilon™ PRO vs. Plasti-Paste™ EPOXYEcoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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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 cpsPaste
Pot Life1 minute22 minutes40 minutes
Cure Time5 minutes16 hours16 hours
Shore D Hardness6580
Shore A Hardness5
ColorTranslucentClear AmberOff-White
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™ PROPlasti-Paste™ EPOXY
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps4,000 cpsPaste
Mix Ratio By Volume1A:1B2A:1B2A:1B
Mix Ratio By Weight1A:1B100A:44B2A:1B
Pot Life1 minute22 minutes40 minutes
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours60 minutes
Cure Time5 minutes16 hours16 hours
Shore D Hardness6580
Shore A Hardness5
Specific Gravity1.07 g/cc1.11 g/cc1.0 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.27.73 cu. in./lb.
ColorTranslucentClear AmberOff-White
Die B Tear Strength75 pli
Tensile Strength350 psi
Tensile Modulus470,000 psi
Ultimate Tensile3,320 psi
Elongation @ Break1,000 %0.83 %
100% Modulus15 psi
Compressive Strength7,700 psi
Compressive Modulus138,000 psi
Flexural Strength9,186 psi
Flexural Modulus2,273,000 psi
Shrinkage<.001 in. / in.0.001 in. / in.
Heat Deflection Temp160 °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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Plasti-Paste™ EPOXY

Plasti-Paste™ EPOXY is an epoxy-based version of Smooth-On’s popular urethane Plasti-Paste™ products. It is a two component, fiber-filled epoxy designed for vertical surface application. Part A is a paste and Part B is a liquid. Mix ratio is 2A: 1B by volume or weight. Pot life is 40 minutes and cure time is 16 hours at room temperature depending on mass. Applying heat can reduce cure time. Mixed material holds a vertical surface without sagging and cures very rigid and strong.

Liquid material can be colored with UVO™ colorants and cured epoxy can be sanded, machined and painted with acrylic enamel paints. This plastic can used as a support shell or mother mold material to reinforce rubber molds during casting. It can also be used for creating themed environments, creating art or special effects. This epoxy is also a powerful adhesive and can be used as a repair material for a variety of industrial applications.

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