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Ecoflex™ 5

Mold Max™ STROKE vs. Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener

Super-Soft, Addition Cure Silicone Rubber

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Mold Max™ STROKE

Mold Max™ STROKE vs. Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 HardenerEcoflex™ 5 versus EpoxAcast™ 655 + 102 Hardener

Brushable Silicone Mold 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 cps23,000 cpsBrushable
Mix Ratio By Volume1A:1BN/A (gram scale required)N/A (gram scale required)
Pot Life1 minute75 minutes30 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness90
Shore A Hardness530
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.23.5 cu. in./lb.
ColorTranslucentGreyWhite
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 HardenerMold Max™ STROKE
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps23,000 cpsBrushable
Mix Ratio By Volume1A:1B
Mix Ratio By Weight1A:1B100A:11B100A:10B
Pot Life1 minute75 minutes30 minutes
Thin Film Recoat Time60 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness90
Shore A Hardness530
Specific Gravity1.07 g/cc1.66 g/cc1.18 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.23.5 cu. in./lb.
ColorTranslucentGreyWhite
Die B Tear Strength75 pli125 pli
Tensile Strength350 psi577 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break1,000 %300 %
100% Modulus15 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.0.002 in. / in.
Heat Deflection Temp135 °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™ 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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Mold Max™ STROKE

Mold Max™ STROKE is a brushable tin silicone rubber that self-thickens for making fast brush-on molds of almost any model. Properly applied, it will hold a vertical surface and will reproduce the finest detail. Mixed 100A:10B by weight, rubber quickly develops thixotropy and can be applied with a brush or spatula. Working time is 30 minutes, re-coat time is 45 minutes and cure time after the final layer has been applied is 16 hours at room temperature.

Mold Max™ STROKE silicone will not stick to most surfaces and will cure with negligible shrinkage to a strong, flexible Shore 30A rubber. 4 thin layers is all that is necessary to make a strong and durable production mold for casting wax, gypsum, concrete or resins (urethane, polyester, etc.). Applications include reproducing sculpture, architectural restoration, candle molds, etc.

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