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Ecoflex™ 5

Ecoflex™ 5 vs. PMC®-746 vs. TASK™ 14

Super-Soft, Addition Cure Silicone Rubber

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TASK™ 14

Ecoflex™ 5 vs. PMC®-746 vs. TASK™ 14Ecoflex™ 5

Semi-Rigid Black Urethane Casting Resin

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PMC®-746

Ecoflex™ 5 vs. PMC®-746 vs. TASK™ 14Ecoflex™ 5 versus TASK™ 14

Polyurethane Rubber Compound

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps800 cps1,200 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)2A:1B
Pot Life1 minute10 minutes15 minutes
Cure Time5 minutes45 minutes16 hours
Shore D Hardness50
Shore A Hardness560
ColorTranslucentBlackAmber
Tensile Strength350 psi1,800 psi700 psi
Elongation @ Break1,000 %125 %650 %
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™ 14PMC®-746
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Rubber
Mixed Viscosity13,000 cps800 cps1,200 cps
Mix Ratio By Volume1A:1B2A:1B
Mix Ratio By Weight1A:1B100A:120B2A:1B
Pot Life1 minute10 minutes15 minutes
Cure Time5 minutes45 minutes16 hours
Shore D Hardness50
Shore A Hardness560
Specific Gravity1.07 g/cc1.15 g/cc1.03 g/cc
Specific Volume25.8 cu. in./lb.24.1 cu. in./lb.26.9 cu. in./lb.
ColorTranslucentBlackAmber
Die B Tear Strength75 pli
Die C Tear Strength100 pli
Tensile Strength350 psi1,800 psi700 psi
Elongation @ Break1,000 %125 %650 %
100% Modulus15 psi220 psi
Shrinkage<.001 in. / in.0.0035 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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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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PMC®-746

PMC®-746 was developed to make molds for casting gypsum plasters. This product is well suited for use as a rubber case mold – especially large case molds where extra rigidity is required. Shore hardness is 60A. Because of its durability and moisture resistant properties PMC®-746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. It features a convenient mix ratio (2:1 by weight or volume), and contains no mercury.

Other applications include making plaster block molds, reproducing ornamental plaster (architectural restoration), pre-cast concrete molds, casting waxes, Smooth-On rigid polyurethanes and epoxies and also for making a variety of special effects for movies and theatre.

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Silicone Rubber - Tin Cure ›

Silicone Rubber - Platinum Cure ›

Urethane Rubber ›

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Urethane Resins ›

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Polymer Modifiers for Concrete and Gypsum ›