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Ecoflex™ 5

Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener vs. SORTA-Clear™ 12

Super-Soft, Addition Cure Silicone Rubber

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SORTA-Clear™ 12

Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener vs. SORTA-Clear™ 12Ecoflex™ 5 versus EpoxAcast™ 655 + 102 Hardener

Addition Cure Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps23,000 cps6,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:1B
Pot Life1 minute75 minutes40 minutes
Cure Time5 minutes9 hours12 hours
Shore D Hardness90
Shore A Hardness512
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.25.9 cu. in./lb.
ColorTranslucentGreyWater White Translucent
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™ 655 + 102 HardenerSORTA-Clear™ 12
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Platinum Cure
Mixed Viscosity13,000 cps23,000 cps6,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:11B1A:1B
Pot Life1 minute75 minutes40 minutes
Cure Time5 minutes9 hours12 hours
Shore D Hardness90
Shore A Hardness512
Specific Gravity1.07 g/cc1.66 g/cc1.07 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.25.9 cu. in./lb.
ColorTranslucentGreyWater White Translucent
Die B Tear Strength75 pli66 pli
Tensile Strength350 psi320 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break1,000 %590 %
100% Modulus15 psi23 psi
Compressive Strength12,500 psi
Compressive Modulus125,500 psi
Flexural Strength7,660 psi
Flexural Modulus1,403,000 psi
Shrinkage<.001 in. / in.0.0006 in. / in.<.001 in. / in.
Heat Deflection Temp135 °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™ 655 + 102 Hardener

EpoxAcast655 (formerly Metalset™ A-30) is a versatile aluminum filled castable epoxy that is very hard and strong. It is dimensionally stable, even when mass cast up to 512 in3 / 8,390 cm3.

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SORTA-Clear™ 12

SORTA-Clear™ 12 is a premium water white translucent silicone rubber (platinum catalyst) which cures at room temperature with negligible shrinkage. SORTA-Clear™ 12 cures in 12 hours with a final Shore hardness of 12A. SORTA-Clear™ 12 features exceptional tear and tensile strength. Rubber clarity is especially useful when extracting models via cutting.

SORTA-Clear™ silicone is ideal for making prototype, jewelry or other molds of any configuration where model visibility is important (i.e. extracting a model from the mold via cutting). Materials such as urethane, epoxy or polyester resins can then be cast into SORTA-Clear™ silicone without application of a release agent. Other materials such as wax and low melt metal alloys can also be cast into SORTA-Clear™. SORTA-Clear™ can be pigmented with SILC Pig™ pigments.

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