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Ecoflex™ 5

Ecoflex™ 5 vs. Epsilon™ PRO vs. SORTA-Clear™ 12

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

Ecoflex™ 5 vs. Epsilon™ PRO vs. SORTA-Clear™ 12Ecoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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SORTA-Clear™ 12

Ecoflex™ 5 vs. Epsilon™ PRO vs. SORTA-Clear™ 12Ecoflex™ 5 versus Epsilon™ PRO

Addition Cure Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps4,000 cps6,000 cps
Pot Life1 minute22 minutes40 minutes
Cure Time5 minutes16 hours12 hours
Shore D Hardness65
Shore A Hardness512
ColorTranslucentClear AmberWater White Translucent
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™ PROSORTA-Clear™ 12
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps4,000 cps6,000 cps
Mix Ratio By Volume1A:1B2A:1B1A:1B
Mix Ratio By Weight1A:1B100A:44B1A:1B
Pot Life1 minute22 minutes40 minutes
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours
Cure Time5 minutes16 hours12 hours
Shore D Hardness65
Shore A Hardness512
Specific Gravity1.07 g/cc1.11 g/cc1.07 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.25.9 cu. in./lb.
ColorTranslucentClear AmberWater White Translucent
Die B Tear Strength75 pli66 pli
Tensile Strength350 psi320 psi
Elongation @ Break1,000 %590 %
100% Modulus15 psi23 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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SORTA-Clear™ 12

SORTA-Clear™ 12 is a premium water white translucent silicone rubber (platinum catalyst) which cures at room temperature with negligible shrinkage. SORTA-Clear™ 12 cures in 12 hours with a final Shore hardness of 12A. SORTA-Clear™ 12 features exceptional tear and tensile strength. Rubber clarity is especially useful when extracting models via cutting.

SORTA-Clear™ silicone is ideal for making prototype, jewelry or other molds of any configuration where model visibility is important (i.e. extracting a model from the mold via cutting). Materials such as urethane, epoxy or polyester resins can then be cast into SORTA-Clear™ silicone without application of a release agent. Other materials such as wax and low melt metal alloys can also be cast into SORTA-Clear™. SORTA-Clear™ can be pigmented with SILC Pig™ pigments.

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