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Ecoflex™ 5

Ecoflex™ 5 vs. Brush-On® 35

Super-Soft, Addition Cure Silicone Rubber

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Brush-On® 35

Ecoflex™ 5 vs. Brush-On® 35Ecoflex™ 5

"Brushable" Polyurethane Rubber Compound

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Rubber
Mixed Viscosity13,000 cpsBrushable
Pot Life1 minute20 minutes
Cure Time5 minutes16 hours
Shore A Hardness535
ColorTranslucentGrey-Green
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™ 5Brush-On® 35
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Rubber
Mixed Viscosity13,000 cpsBrushable
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:67B
Pot Life1 minute20 minutes
Cure Time5 minutes16 hours
Shore A Hardness535
Specific Gravity1.07 g/cc1.29 g/cc
Specific Volume25.8 cu. in./lb.21.5 cu. in./lb.
ColorTranslucentGrey-Green
Die B Tear Strength75 pli
Die C Tear Strength57 pli
Tensile Strength350 psi335 psi
Elongation @ Break1,000 %1,000 %
100% Modulus15 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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Brush-On® 35

Smooth-On’s Brush-On® Series of mold rubbers are extremely versatile and are famous for their abrasion resistance and high tear strength. They have the convenience of a one-to-one mix ratio and are easy to mix and apply with a brush or spatula.

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