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Ecoflex™ 5

FMC™ 205 vs. Ecoflex™ 5 vs. TASK™ 14

Super-Soft, Addition Cure Silicone Rubber

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TASK™ 14

FMC™ 205 vs. Ecoflex™ 5 vs. TASK™ 14Ecoflex™ 5

Semi-Rigid Black Urethane Casting Resin

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Polysulfide Rubber
Mixed Viscosity13,000 cps800 cps6,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)N/A (gram scale required)
Pot Life1 minute10 minutes90 minutes
Cure Time5 minutes45 minutes16 hours
Shore D Hardness50
Shore A Hardness512
Specific Volume25.8 cu. in./lb.24.1 cu. in./lb.20.1 cu. in./lb.
ColorTranslucentBlackBlack
Tensile Strength350 psi1,800 psi60 psi
Elongation @ Break1,000 %125 %550 %
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™ 5TASK™ 14FMC™ 205
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Polysulfide Rubber
Mixed Viscosity13,000 cps800 cps6,000 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight1A:1B100A:120B100A:12B
Pot Life1 minute10 minutes90 minutes
Cure Time5 minutes45 minutes16 hours
Shore D Hardness50
Shore A Hardness512
Specific Gravity1.07 g/cc1.15 g/cc1.38 g/cc
Specific Volume25.8 cu. in./lb.24.1 cu. in./lb.20.1 cu. in./lb.
ColorTranslucentBlackBlack
Die B Tear Strength75 pli
Tensile Strength350 psi1,800 psi60 psi
Elongation @ Break1,000 %125 %550 %
100% Modulus15 psi15 psi
Shrinkage<.001 in. / in.0.0035 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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TASK™ 14

TASK™ 14 is a fast setting two-component urethane that cures quickly to black semi-rigid plastic. TASK™ 14 offers a longer pot life (10 minutes) and demold time of 45 minutes.

With a Shore value of 50D, these semi-rigid plastics are used for a variety of industrial applications including fast mold making, fast model duplication, prototyping, durable miniatures, black props and special effects, or making parts that are impact resistant. Fully cured castings are tough, durable and chemical resistant.

For Best Results… Do not cast TASK™ 14 into platinum cure (addition cure) silicone molds.

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FMC™ 205

FMC™-205 is a polysulfide rubber mold compound that cures overnight with negligible shrinkage to a lasting durable rubber that will perform in production. The mix ratio is 100 parts of Part A to 12 parts of Part B by weight. FMC™-205 cures to a Shore hardness of 12 A.

FMC™-205 is ideal for those applications that require capturing intricate detail from a variety of model surfaces. Unlike polyurethanes, FMC™-205 is not sensitive to moisture and can be poured directly over wet plaster or water/sulfur based clays. Common applications include molds of sculpture (lost wax process), casting various gypsum products and waxes. 

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Silicone Rubber - Tin Cure ›

Silicone Rubber - Platinum Cure ›

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Mix and Pour Expanding Foams ›

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Skin Safe FX Materials ›

Polymer Modifiers for Concrete and Gypsum ›