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Ecoflex™ 5

Ecoflex™ 5 vs. ReoFlex™ 20

Super-Soft, Addition Cure Silicone Rubber

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ReoFlex™ 20

Ecoflex™ 5 vs. ReoFlex™ 20Ecoflex™ 5

'Next Generation' Urethane Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Rubber
Mixed Viscosity13,000 cps1,800 cps
Pot Life1 minute30 minutes
Cure Time5 minutes16 hours
Shore A Hardness520
ColorTranslucentOff White
Tensile Strength350 psi200 psi
100% Modulus15 psi27 psi
Disclaimer
Although we do our best to ensure accuracy, Smooth-On offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained on this Compare Tool, nor suitability of the information contained herein to your particular circumstances. Smooth-On assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, the Compare Tool, or from your use (or failure to use) the information contained herein. Other useful tools include product technical bulletins and our extensive FAQ section. You can also contact our technical support team.

All Technical Data

Ecoflex™ 5ReoFlex™ 20
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Rubber
Mixed Viscosity13,000 cps1,800 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B1A:1B
Pot Life1 minute30 minutes
Cure Time5 minutes16 hours
Shore A Hardness520
Specific Gravity1.07 g/cc1.01 g/cc
Specific Volume25.8 cu. in./lb.27.3 cu. in./lb.
ColorTranslucentOff White
Die B Tear Strength75 pli
Die C Tear Strength60 pli
Tensile Strength350 psi200 psi
Elongation @ Break1,000 %1,000 %
100% Modulus15 psi27 psi
Shrinkage<.001 in. / in.<.001 in. / in.
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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ReoFlex™ 20

ReoFlex™ urethane rubbers offer superior physical and performance properties for production casting of wax, plasters, and resins. ReoFlex™ urethanes are available in 20A, 30A, 40A, 50A and 60A Shore hardnesses and feature convenient one-to-one by volume mix ratios. Vacuum degassing is not necessary and ReoFlex™ rubbers cure with negligible shrinkage to a durable rubber that will last in production. ReoFlex™ “Wet” rubbers will shrink somewhat over time vs. “Dry” formulations.

ReoFlex™ mold rubbers are used for a variety of applications including making molds to reproduce sculpture and architectural elements, as well as for making special effects, toys and prototypes. Vibrant colors can be achieved by adding So-Strong™ Color Tints, available from Smooth-On.

Casting Concrete? Look into the VytaFlex™ series of urethane mold rubbers. VytaFlex™ urethanes were formulated specifically for casting concrete / pigmented concrete and feature Smooth-On’s exclusive ‘V-Polymer™’ technology.

FOR COMMERCIAL/INDUSTRIAL USE ONLY

Click here for more ReoFlex™ rubber products.

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