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Ecoflex™ 5

Ecoflex™ 5 vs. PMC®-724 vs. Epsilon™ PRO

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

Ecoflex™ 5 vs. PMC®-724 vs. Epsilon™ PROEcoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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PMC®-724

Ecoflex™ 5 vs. PMC®-724 vs. Epsilon™ PROEcoflex™ 5 versus Epsilon™ PRO

Polyurethane Rubber Compound

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Urethane Rubber
Mixed Viscosity13,000 cps4,000 cps4,000 cps
Mix Ratio By Volume1A:1B2A:1BN/A (gram scale required)
Pot Life1 minute22 minutes20 minutes
Cure Time5 minutes16 hours16 hours
Shore D Hardness65
Shore A Hardness540
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.20.1 cu. in./lb.
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™ PROPMC®-724
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Urethane Rubber
Mixed Viscosity13,000 cps4,000 cps4,000 cps
Mix Ratio By Volume1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:44B10A:100B
Pot Life1 minute22 minutes20 minutes
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours
Cure Time5 minutes16 hours16 hours
Shore D Hardness65
Shore A Hardness540
Specific Gravity1.07 g/cc1.11 g/cc1.38 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.20.1 cu. in./lb.
ColorTranslucentClear AmberOff-White
Die B Tear Strength75 pli
Die C Tear Strength90 pli
Tensile Strength350 psi600 psi
Elongation @ Break1,000 %>700 %
100% Modulus15 psi80 psi
Shrinkage<.001 in. / in.<.001 in. / in.
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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PMC®-724

Used by artists and industry the world over for a variety of design, casting and special effects applications, PMC®-724 is by far the most versatile urethane rubber compound available on the market today. It is inexpensive, mixes and pours easily, and will cure to a durable rubber with negligible shrinkage. Low viscosity ensures flawless pick-up of even the finest detail with minimal bubble entrapment.

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