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Ecoflex™ 5

Ecoflex™ 5 vs. PMC®-780 DRY vs. Smooth-Cast® 310

Super-Soft, Addition Cure Silicone Rubber

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Smooth-Cast® 310

Ecoflex™ 5 vs. PMC®-780 DRY vs. Smooth-Cast® 310Ecoflex™ 5

Bright White, Ultra Low Viscosity Liquid Plastics

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PMC®-780 DRY

Ecoflex™ 5 vs. PMC®-780 DRY vs. Smooth-Cast® 310Ecoflex™ 5 versus Smooth-Cast® 310

Industrial Liquid Rubber Compound

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps80 cps2,000 cps
Pot Life1 minute20 minutes25 minutes
Cure Time5 minutes4 hours48 hours
Shore D Hardness70
Shore A Hardness580
ColorTranslucentWhiteLight Amber
Tensile Strength350 psi3,000 psi900 psi
Elongation @ Break1,000 %7.5 %750 %
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® 310PMC®-780 DRY
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps80 cps2,000 cps
Mix Ratio By Volume1A:1B1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:90B2A:1B
Pot Life1 minute20 minutes25 minutes
Cure Time5 minutes4 hours48 hours
Shore D Hardness70
Shore A Hardness580
Specific Gravity1.07 g/cc1.05 g/cc1.02 g/cc
Specific Volume25.8 cu. in./lb.26.4 cu. in./lb.27.2 cu. in./lb.
ColorTranslucentWhiteLight Amber
Die B Tear Strength75 pli
Die C Tear Strength200 pli
Tensile Strength350 psi3,000 psi900 psi
Tensile Modulus134,000 psi
Elongation @ Break1,000 %7.5 %750 %
100% Modulus15 psi400 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 °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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PMC®-780 DRY

PMC-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance. PMC-780 DOES NOT CONTAIN MOCA – a known cancer causing agent and hazard. Mixed two parts A to one part B by weight or volume, PMC-780 urethane pours easily and cures at room temperature with negligible shrinkage to a solid Shore 80A rubber.

Pick The One Best Suited For Your Application: Original PMC-780 Dry does not exude oil. New PMC-780 Wet contains a built in release agent to aid in demolding concrete. (Note: “wet” rubber has a higher net shrinkage value over time vs. “dry “ rubber.)

 

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