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Ecoflex™ 5

Ecoflex™ 5 vs. Smooth-Cast® 300Q vs. Epsilon™ PRO

Super-Soft, Addition Cure Silicone Rubber

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Epsilon™ PRO

Ecoflex™ 5 vs. Smooth-Cast® 300Q vs. Epsilon™ PROEcoflex™ 5

High Performance Impact Resistant EPS Foam Coating

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Smooth-Cast® 300Q

Ecoflex™ 5 vs. Smooth-Cast® 300Q vs. Epsilon™ PROEcoflex™ 5 versus Epsilon™ PRO

Bright White, Ultra Low Viscosity Liquid Plastic

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Urethane Resins
Mixed Viscosity13,000 cps4,000 cps80 cps
Pot Life1 minute22 minutes30 seconds
Cure Time5 minutes16 hours5 minutes
Shore D Hardness6570
Shore A Hardness5
ColorTranslucentClear AmberWhite
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™ PROSmooth-Cast® 300Q
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy and Urethane Coatings
  • Urethane Resins
Mixed Viscosity13,000 cps4,000 cps80 cps
Mix Ratio By Volume1A:1B2A:1B1A:1B
Mix Ratio By Weight1A:1B100A:44B100A:90B
Pot Life1 minute22 minutes30 seconds
Thin Film Working Time35 minutes
Thin Film Recoat Time3 hours
Cure Time5 minutes16 hours5 minutes
Shore D Hardness6570
Shore A Hardness5
Specific Gravity1.07 g/cc1.11 g/cc1.05 g/cc
Specific Volume25.8 cu. in./lb.25.0 cu. in./lb.26.4 cu. in./lb.
ColorTranslucentClear AmberWhite
Die B Tear Strength75 pli
Tensile Strength350 psi3,000 psi
Tensile Modulus139,500 psi
Elongation @ Break1,000 %5 %
100% Modulus15 psi
Compressive Strength4,000 psi
Compressive Modulus45,800 psi
Flexural Strength4,510 psi
Flexural Modulus128,000 psi
Shrinkage<.001 in. / in.0.01 in. / in.
Heat Deflection Temp120 °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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Smooth-Cast® 300Q

 

Smooth-Cast® 300Q liquid plastic is a quick setting, ultra-low viscosity casting resin that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. It offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. 

This resin readily accept fillers (such as URE-FIL® 3 from Smooth-On) and can be colored with SO-Strong® or Ignite® color tints (Smooth-Cast® 325 series accepts pigments better than the Smooth Cast® 300 series). Fully cured castings are tough, durable, machinable and paintable. It resists moisture and mild solvents. Applications for Smooth-Cast® 300Q Liquid Plastics include reproducing small to medium size sculptures, casting into alginate molds, making prototype models, special effect props and decorative jewelry. 

Those interested in making roto cast pieces should refer to the Smooth-Cast® 65D technical bulletin.

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