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Ecoflex™ 5

Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener vs. VytaFlex™ 45

Super-Soft, Addition Cure Silicone Rubber

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VytaFlex™ 45

Ecoflex™ 5 vs. EpoxAcast™ 655 + 102 Hardener vs. VytaFlex™ 45Ecoflex™ 5 versus EpoxAcast™ 655 + 102 Hardener

Urethane Mold Rubber For Perfect Concrete Castings

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps23,000 cps2,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:1B
Pot Life1 minute75 minutes30 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness90
Shore A Hardness545
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.26.4 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 HardenerVytaFlex™ 45
Product Type
  • Silicone Rubber - Platinum Cure
  • Epoxy Casting and Laminating Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps23,000 cps2,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:11B1A:1B
Pot Life1 minute75 minutes30 minutes
Cure Time5 minutes9 hours16 hours
Shore D Hardness90
Shore A Hardness545
Specific Gravity1.07 g/cc1.66 g/cc1.04 g/cc
Specific Volume25.8 cu. in./lb.16.7 cu. in./lb.26.4 cu. in./lb.
ColorTranslucentGreyOff White
Die B Tear Strength75 pli
Die C Tear Strength100 pli
Tensile Strength350 psi886 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break1,000 %900 %
100% Modulus15 psi116 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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VytaFlex™ 45

Using Smooth-On’s exclusive “V-Polymer™” technology, VytaFlex™ urethane rubbers offer superior physical and performance properties for casting concrete. VytaFlex™ urethanes are available in 10A, 20A, 30A, 40A, 45A, 50A and 60A Shore hardness’s and feature convenient one-to-one by volume mix ratios.

Vacuum degassing is not necessary and VytaFlex™ rubbers cure with negligible shrinkage to a durable rubber that will last in production.

VytaFlex™ mold rubbers work especially well for casting pigmented / colored concrete. Molds made with VytaFlex™ Series urethanes will render accurate and uniform colored castings.

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