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Ecoflex™ 5

Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener vs. Plasti-Paste™ EPOXY

Super-Soft, Addition Cure Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps23,000 cpsPaste
Mix Ratio By Volume1A:1BN/A (gram scale required)2A:1B
Pot Life1 minute75 minutes40 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness9080
Shore A Hardness5
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.27.73 cu. in./lb.
ColorTranslucentGreyOff-White
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 HardenerPlasti-Paste™ EPOXY
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Epoxy Casting and Laminating Resins
Mixed Viscosity13,000 cps23,000 cpsPaste
Mix Ratio By Volume1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:11B2A:1B
Pot Life1 minute75 minutes40 minutes
Thin Film Recoat Time60 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness9080
Shore A Hardness5
Specific Gravity1.07 g/cc1.66 g/cc1.0 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.27.73 cu. in./lb.
ColorTranslucentGreyOff-White
Die B Tear Strength75 pli
Tensile Strength350 psi
Tensile Modulus2,040,000 psi470,000 psi
Ultimate Tensile4,810 psi3,320 psi
Elongation @ Break1,000 %0.83 %
100% Modulus15 psi
Compressive Strength12,500 psi7,700 psi
Compressive Modulus125,500 psi138,000 psi
Flexural Strength7,660 psi9,186 psi
Flexural Modulus1,403,000 psi2,273,000 psi
Shrinkage<.001 in. / in.0.0006 in. / in.0.001 in. / in.
Heat Deflection Temp135 °F160 °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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Plasti-Paste™ EPOXY

Plasti-Paste™ EPOXY is an epoxy-based version of Smooth-On’s popular urethane Plasti-Paste™ products. It is a two component, fiber-filled epoxy designed for vertical surface application. Part A is a paste and Part B is a liquid. Mix ratio is 2A: 1B by volume or weight. Pot life is 40 minutes and cure time is 16 hours at room temperature depending on mass. Applying heat can reduce cure time. Mixed material holds a vertical surface without sagging and cures very rigid and strong.

Liquid material can be colored with UVO™ colorants and cured epoxy can be sanded, machined and painted with acrylic enamel paints. This plastic can used as a support shell or mother mold material to reinforce rubber molds during casting. It can also be used for creating themed environments, creating art or special effects. This epoxy is also a powerful adhesive and can be used as a repair material for a variety of industrial applications.

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