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Ecoflex™ 5

Ecoflex™ 5 vs. EZ-Spray® Silicone 35 vs. EpoxAcast™ 650 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Ecoflex™ 5 vs. EZ-Spray® Silicone 35 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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EZ-Spray® Silicone 35

Ecoflex™ 5 vs. EZ-Spray® Silicone 35 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 650 + 102 Hardener

Sprayable Silicone Rubber Compound

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps7,000 cpsSprayable
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:1B
Pot Life1 minute90 minutes1.5 minutes
Cure Time5 minutes4 hours1 hour
Barcol 935 Hardness93
Shore A Hardness535
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.24.1 cu. in./lb.
ColorTranslucentOff WhitePurple
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™ 5EpoxAcast™ 650 + 102 HardenerEZ-Spray® Silicone 35
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps7,000 cpsSprayable
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:13B
Pot Life1 minute90 minutes1.5 minutes
Cure Time5 minutes4 hours1 hour
Barcol 935 Hardness93
Shore A Hardness535
Specific Gravity1.07 g/cc1.52 g/cc1.15 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.24.1 cu. in./lb.
ColorTranslucentOff WhitePurple
Die B Tear Strength75 pli92 pli
Tensile Strength350 psi490 psi
Tensile Modulus1,503,000 psi
Ultimate Tensile6,000 psi
Elongation @ Break1,000 %415 %
100% Modulus15 psi
Compressive Strength16,350 psi
Compressive Modulus142,600 psi
Flexural Strength5,890 psi
Flexural Modulus710,000 psi
Shrinkage<.001 in. / in.0.001 in. / in.<.001 in. / in.
Heat Deflection Temp129 °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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EpoxAcast™ 650 + 102 Hardener

EpoxAcast™ 650 is a mineral filled general purpose casting epoxy that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment.

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EZ-Spray® Silicone 35

EZ~Spray® 35 is a platinum cure silicone rubber developed specifically for spraying through the EZ~Spray® Junior Cartridge System. With no or minimal surface preparation, EZ~Spray® 35 can be sprayed onto vertical surfaces for making fast rubber molds of large surface areas. After a suitable thickness is attained, EZ~Spray® 35 cures in 1 hour with negligible shrinkage to a durable mold rubber good for production casting resins, foams, concrete, plaster and other materials. Application of a support shell is achieved by spraying Smooth-On’s EZ~Spray® Plastic over the rubber mold after it has fully cured. Read the EZ~Spray® Junior manual prior to spraying.

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