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Ecoflex™ 5

Smooth-Sil™ 950 vs. Ecoflex™ 5

Super-Soft, Addition Cure Silicone Rubber

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Smooth-Sil™ 950

Smooth-Sil™ 950 vs. Ecoflex™ 5Ecoflex™ 5

Addition Cure Silicone Rubber Compounds

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Key Differences

Mixed Viscosity13,000 cps35,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)
Pot Life1 minute45 minutes
Cure Time5 minutes18 hours
Shore A Hardness550
ColorTranslucentBlue
Die B Tear Strength75 pli155 pli
Tensile Strength350 psi725 psi
Elongation @ Break1,000 %320 %
100% Modulus15 psi272 psi
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-Sil™ 950
Product Type
  • Silicone Rubber - Platinum Cure
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps35,000 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight1A:1B100A:10B
Pot Life1 minute45 minutes
Cure Time5 minutes18 hours
Shore A Hardness550
Specific Gravity1.07 g/cc1.24 g/cc
Specific Volume25.8 cu. in./lb.22.3 cu. in./lb.
ColorTranslucentBlue
Die B Tear Strength75 pli155 pli
Tensile Strength350 psi725 psi
Elongation @ Break1,000 %320 %
100% Modulus15 psi272 psi
Shrinkage<.001 in. / in.<.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)450 °F450 °F
Thermal Conductivity0.261 W/M*K

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-Sil™ 950

Smooth-On Smooth-Sil™ Platinum Silicones cure at room temperature with negligible shrinkage. With different hardnesses to choose from, Smooth-Sil™ products offer tremendous versatility and are suitable for making production molds of any configuration, large or small. These silicones exhibit good chemical, abrasion and heat resistance. Materials such as plasters, concrete, wax, low-melt metal alloys or resins (urethane, epoxy or polyester) can then be cast into these silicone rubbers without a release agent.

Smooth-Sil™ Platinum Silicones are used for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete. Smooth-Sil™ 950 is suitable for food related applications. 

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