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Ecoflex™ 5

Ecoflex™ 5 vs. TASK™ 14 vs. Plasti-Paste®

Super-Soft, Addition Cure Silicone Rubber

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TASK™ 14

Ecoflex™ 5 vs. TASK™ 14 vs. Plasti-Paste®Ecoflex™ 5

Semi-Rigid Black Urethane Casting Resin

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Resins
Mixed Viscosity13,000 cps800 cpsLight Paste
Mix Ratio By Volume1A:1BN/A (gram scale required)1A:3B
Pot Life1 minute10 minutes10 minutes
Cure Time5 minutes45 minutes90 minutes
Shore D Hardness5070
Shore A Hardness5
ColorTranslucentBlackOff White
Elongation @ Break1,000 %125 %1.5 %
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™ 14Plasti-Paste®
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Urethane Resins
Mixed Viscosity13,000 cps800 cpsLight Paste
Mix Ratio By Volume1A:1B1A:3B
Mix Ratio By Weight1A:1B100A:120B41A:100B
Pot Life1 minute10 minutes10 minutes
Cure Time5 minutes45 minutes90 minutes
Shore D Hardness5070
Shore A Hardness5
Specific Gravity1.07 g/cc1.15 g/cc1.16 g/cc
Specific Volume25.8 cu. in./lb.24.1 cu. in./lb.23.9 cu. in./lb.
ColorTranslucentBlackOff White
Die B Tear Strength75 pli
Tensile Strength350 psi1,800 psi
Tensile Modulus168,100 psi
Ultimate Tensile1,600 psi
Elongation @ Break1,000 %125 %1.5 %
100% Modulus15 psi
Compressive Strength3,420 psi
Compressive Modulus48,800 psi
Flexural Strength3,410 psi
Flexural Modulus150,000 psi
Shrinkage<.001 in. / in.0.0035 in. / in.0.005 in. / in.
Heat Deflection Temp130 °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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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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Plasti-Paste®

Plasti-Paste® is a two component fiber resin that is designed for vertical surface application. Part A is a liquid and Part B is a paste. Mix ratio is 1A : 3B by volume (41A:100B by weight). It has no odor and pot life is 8 – 10 minutes depending on mass. Demold time (can be handled) is about 90 minutes depending on mass. Plasti-Paste® holds a vertical surface without sagging and cures to a strong, durable and lightweight plastic. Suitable as a mother mold / support shell (reinforces shape of rubber mold during casting). Can be pigmented with So-Strong® color tints from Smooth-On. Add cabosil or other filler as an extender or for special effects.

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