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Ecoflex™ 5

Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST vs. Dragon Skin™ 10 NV

Super-Soft, Addition Cure Silicone Rubber

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Dragon Skin™ 10 NV

Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST vs. Dragon Skin™ 10 NVEcoflex™ 5 versus Smooth-Cast® ONYX™ FAST

Low Viscosity, High Performance Platinum Silicone

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps100 cps6,000 cps
Pot Life1 minute2.5 minutes15 minutes
Cure Time5 minutes15 minutes75 minutes
Shore D Hardness80
Shore A Hardness510
ColorTranslucentBlackWater White Translucent
Tensile Strength350 psi5,840 psi400 psi
Elongation @ Break1,000 %4 %663 %
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™ FASTDragon Skin™ 10 NV
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps100 cps6,000 cps
Mix Ratio By Volume1A:1B100A:100B1A:1B
Mix Ratio By Weight1A:1B120A:100B1A:1B
Pot Life1 minute2.5 minutes15 minutes
Cure Time5 minutes15 minutes75 minutes
Shore D Hardness80
Shore A Hardness510
Specific Gravity1.07 g/cc1.09 g/cc1.07 g/cc
Specific Volume25.8 cu. in./lb.27.7 cu. in./lb.25.8 cu. in./lb.
ColorTranslucentBlackWater White Translucent
Die B Tear Strength75 pli90 pli
Tensile Strength350 psi5,840 psi400 psi
Tensile Modulus246,000 psi
Elongation @ Break1,000 %4 %663 %
100% Modulus15 psi27 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.<.001 in. / in.
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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Dragon Skin™ 10 NV

Dragon Skin™ 10 NV is a low viscosity, high performance platinum cure silicone rubber that is easy to use and versatile. Mix ratio is 1A:1B by weight or volume, pot life is 15 minutes and cure time is 75 minutes at room temperature. Rubber cures with negligible shrinkage to a Shore 10A. Vacuum degassing is not necessary Color is water white translucent.

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