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Ecoflex™ 5

Free Form™ SCULPT vs. Ecoflex™ 5 vs. Smooth-Cast® 310

Super-Soft, Addition Cure Silicone Rubber

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Smooth-Cast® 310

Free Form™ SCULPT vs. Ecoflex™ 5 vs. Smooth-Cast® 310Ecoflex™ 5

Bright White, Ultra Low Viscosity Liquid Plastics

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Free Form™ SCULPT

Free Form™ SCULPT vs. Ecoflex™ 5 vs. Smooth-Cast® 310Ecoflex™ 5 versus Smooth-Cast® 310

High Density Epoxy Dough-Crystalline Silica Free

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Putties
Mixed Viscosity13,000 cps80 cpsPutty
Pot Life1 minute20 minutes1.5 hours
Shore D Hardness7080
Shore A Hardness5
Specific Volume25.8 cu. in./lb.26.4 cu. in./lb.20.73 cu. in./lb.
ColorTranslucentWhiteGrey
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™ 5Smooth-Cast® 310Free Form™ SCULPT
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Epoxy Putties
Mixed Viscosity13,000 cps80 cpsPutty
Mix Ratio By Volume1A:1B1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:90B
Pot Life1 minute20 minutes1.5 hours
Cure Time5 minutes4 hours
Shore D Hardness7080
Shore A Hardness5
Specific Gravity1.07 g/cc1.05 g/cc1.33 g/cc
Specific Volume25.8 cu. in./lb.26.4 cu. in./lb.20.73 cu. in./lb.
ColorTranslucentWhiteGrey
Die B Tear Strength75 pli
Tensile Strength350 psi3,000 psi
Tensile Modulus134,000 psi
Elongation @ Break1,000 %7.5 %
100% Modulus15 psi
Compressive Strength3,800 psi
Compressive Modulus44,900 psi
Flexural Strength4,000 psi
Flexural Modulus118,000 psi
Shrinkage<.001 in. / in.0.0065 in. / in.<.001 in. / in.
Heat Deflection Temp120 °F150 °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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Smooth-Cast® 310

The Smooth-Cast® 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. They offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. The differences between them are pot life and demold time.

These resins readily accept fillers (such as URE-FIL® 3 from Smooth-On) and can be colored with SO-Strong® or Ignite® color tints (Smooth-Cast® 325 series accepts pigments better than the Smooth Cast® 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast® 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.

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Free Form™ SCULPT

Free Form™ SCULPT is a two part sculpt-able epoxy clay that requires no firing and will self-cure in a short time to an extremely hard and durable state with virtually no shrinkage. SCULPT is 30% lighter than similar products and holds vertical surfaces better. Users can sculpt larger, stronger pieces with more control over weight distribution. Free Form SCULPT has an ultra fine particle size that gives the user the ability to sculpt finer detail with better precision using tools or shaping by hand.

A mirror-like, gloss finish can be achieved by smoothing SCULPT with water before it cures.

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Silicone Rubber - Tin Cure ›

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Urethane Resins ›

Epoxy Casting and Laminating Resins ›

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Mix and Pour Expanding Foams ›

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Lifecasting Materials ›

Skin Safe FX Materials ›

Polymer Modifiers for Concrete and Gypsum ›