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Ecoflex™ 5

Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST vs. Habitat Cast N Coat™

Super-Soft, Addition Cure Silicone Rubber

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Habitat Cast N Coat™

Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST vs. Habitat Cast N Coat™Ecoflex™ 5 versus Smooth-Cast® ONYX™ FAST

Flame Rated Castable and Brushable Epoxy

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
  • Epoxy and Urethane Coatings
Mixed Viscosity13,000 cps100 cps13,500 cps
Pot Life1 minute2.5 minutes85 minutes
Cure Time5 minutes15 minutes16 hours
Shore D Hardness8085
Shore A Hardness5
Specific Volume25.8 cu. in./lb.27.7 cu. in./lb.18.35 cu. in./lb.
ColorTranslucentBlackTan
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™ 5Smooth-Cast® ONYX™ FASTHabitat Cast N Coat™
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
  • Epoxy and Urethane Coatings
Mixed Viscosity13,000 cps100 cps13,500 cps
Mix Ratio By Volume1A:1B100A:100B1A:1B
Mix Ratio By Weight1A:1B120A:100B1A:1B
Pot Life1 minute2.5 minutes85 minutes
Cure Time5 minutes15 minutes16 hours
Shore D Hardness8085
Shore A Hardness5
Specific Gravity1.07 g/cc1.09 g/cc1.51 g/cc
Specific Volume25.8 cu. in./lb.27.7 cu. in./lb.18.35 cu. in./lb.
ColorTranslucentBlackTan
Die B Tear Strength75 pli
Tensile Strength350 psi5,840 psi
Tensile Modulus246,000 psi
Elongation @ Break1,000 %4 %
100% Modulus15 psi
Compressive Strength8,760 psi
Compressive Modulus77,400 psi
Flexural Strength8,280 psi
Flexural Modulus246,000 psi
Shrinkage<.001 in. / in.0.010 in. / in.
Heat Deflection Temp131 °F
Useful Temperature (min)-65 °F
Useful Temperature (max)450 °F
Heat Deflection With Post Cure250 °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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Smooth-Cast® ONYX™ FAST

Smooth-Cast® ONYX™ is a mercury-free urethane resin that cures at room temperature to a deep black, solid plastic. ONYX™ resins offer the convenience of a 1A:1B by volume mix ratio and have very low viscosities, so they are easy to mix and pour. ONYX™ resins have an ultimate Shore hardness of 80D and offer higher physical properties and higher heat resistance vs. other general purpose resins.ONYX™ FAST resin has a pot life of 2.5 minutes and a cure time of 10-15 minutes. ONYX™ FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects.

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Habitat Cast N Coat™

Habitat Cast N Coat™ is a filled, two component (A+B) liquid epoxy that can be cast solid or thickened for brushing on / troweling on to vertical surfaces. Material cures to a rock-hard solid with negligible shrinkage.
Mix ratio is 1A:1B by volume. Working time is 85 minutes and material cures overnight (at room temperature).  UVO™ or Ignite™ colorants can be added to liquid Cast N Coat™ during mixing to create a variety of color effects. Cured epoxy can be sanded and painted with acrylic paints.
Habitat Cast N Coat™ certifies to the highest flame rating available (ASTM E84, Class A), making this material ideal for public space fabrication applications. Also, it does not contain VOC’s, phthalates or crystalline silica (a known carcinogen) and is safe for making elements used in proximity to animals/reptiles and aquatic life.
Epoxy bonds permanently to itself or a variety of surfaces and can be applied as a fire rated protective/decorative coating to EPS or rigid foam, wallboard, plaster, wood, PVC and more. Habitat Cast N Coat™ is also an excellent repair cement and bonds permanently to itself, PVC, Plexiglas™ (acrylic), wood, many metals, plastics and foams.

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