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Ecoflex™ 5

Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST vs. EpoxAmite™ WHITE 101

Super-Soft, Addition Cure Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps100 cps3,400 cps
Mix Ratio By Volume1A:1B100A:100BN/A (gram scale required)
Pot Life1 minute2.5 minutes20 minutes
Cure Time5 minutes15 minutes15 hours
Shore D Hardness8083
Shore A Hardness5
ColorTranslucentBlackWhite
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™ FASTEpoxAmite™ WHITE 101
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps100 cps3,400 cps
Mix Ratio By Volume1A:1B100A:100B
Mix Ratio By Weight1A:1B120A:100B100A:20B
Pot Life1 minute2.5 minutes20 minutes
Thin Film Working Time45 minutes
Cure Time5 minutes15 minutes15 hours
Shore D Hardness8083
Shore A Hardness5
Specific Gravity1.07 g/cc1.09 g/cc1.25 g/cc
Specific Volume25.8 cu. in./lb.27.7 cu. in./lb.22.2 cu. in./lb.
ColorTranslucentBlackWhite
Die B Tear Strength75 pli
Tensile Strength350 psi5,840 psi
Tensile Modulus246,000 psi627,000 psi
Ultimate Tensile5,130 psi
Tensile Elongation0.8 %
Elongation @ Break1,000 %4 %
100% Modulus15 psi
Compressive Strength8,760 psi16,290 psi
Compressive Modulus77,400 psi116,000 psi
Flexural Strength8,280 psi8,770 psi
Flexural Modulus246,000 psi465,000 psi
Shrinkage<.001 in. / in.0.010 in. / in.
Heat Deflection Temp136 °F
Useful Temperature (min)-65 °F
Useful Temperature (max)450 °F
Flexural Strength on 6 ply / 10 oz. Laminate29,000 psi
Heat Deflection With Post Cure250 °F
Ultimate Tensile on 6 ply / 10 oz. Laminate24,700 psi

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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EpoxAmite™ WHITE 101

EpoxAmite™ White Epoxy Laminating System is an easy-to-use liquid epoxy system formulated for a wide variety of fabrication applications. EpoxAmite™ White Laminating System is odorless and cures at room temperature. Cured epoxy displays exceptional physical and performance properties. It can be sanded, shaped, machined, drilled, tapped and painted.

EpoxAmite™ White Laminating System can be used with reinforcements such as S-Glass, E-Glass, Kevlar and Carbon fibers for lay-up& applications or composite parts. EpoxAmite™ White Resin can also be mixed with fillers such as fumed silica for gel coat applications. Urefil™ 3, Urefil™ 7 and other fillers can be added for fairing, filleting or bonding applications.

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