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Ecoflex™ 5

Mold Max™ 20 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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EpoxAcast™ 650 + 102 Hardener

Mold Max™ 20 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5

Mineral Filled General Purpose Casting Epoxy

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Mold Max™ 20

Mold Max™ 20 vs. Ecoflex™ 5 vs. EpoxAcast™ 650 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 650 + 102 Hardener

High Performance Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps7,000 cps25,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)N/A (gram scale required)
Pot Life1 minute90 minutes45 minutes
Cure Time5 minutes4 hours24 hours
Barcol 935 Hardness93
Shore A Hardness520
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.23.5 cu. in./lb.
ColorTranslucentOff WhiteLight Pink
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 HardenerMold Max™ 20
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps7,000 cps25,000 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight1A:1B100A:13B100A:10B
Pot Life1 minute90 minutes45 minutes
Cure Time5 minutes4 hours24 hours
Barcol 935 Hardness93
Shore A Hardness520
Specific Gravity1.07 g/cc1.52 g/cc1.18 g/cc
Specific Volume25.8 cu. in./lb.18.22 cu. in./lb.23.5 cu. in./lb.
ColorTranslucentOff WhiteLight Pink
Die B Tear Strength75 pli110 pli
Tensile Strength350 psi555 psi
Tensile Modulus1,503,000 psi
Ultimate Tensile6,000 psi
Elongation @ Break1,000 %512 %
100% Modulus15 psi49 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.0.001 in. / in.
Heat Deflection Temp129 °F
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)450 °F400 °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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Mold Max™ 20

Mold Max™ Silicones are tin-cured silicone rubber compounds that have exceptional working properties and library life. Mold Max™ Silicones feature Smooth-On’s exclusive “Libra™” catalyst for long library life. Mold Max™ silcones can be pigmented with Silc Pig™ silicone colorants. Pot life for the pourable silicones is 45 minutes and they cure overnight at room temperature.

Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.

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