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Ecoflex™ 5

Mold Max™ 14NV vs. Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FAST

Super-Soft, Addition Cure Silicone Rubber

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Mold Max™ 14NV

Mold Max™ 14NV vs. Ecoflex™ 5 vs. Smooth-Cast® ONYX™ FASTEcoflex™ 5 versus Smooth-Cast® ONYX™ FAST

Low Viscosity Tin-Cure Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps100 cps7,500 cps
Mix Ratio By Volume1A:1B100A:100BN/A (gram scale required)
Pot Life1 minute2.5 minutes40 minutes
Cure Time5 minutes15 minutes4 hours
Shore D Hardness80
Shore A Hardness514
ColorTranslucentBlackWhite
Tensile Strength350 psi5,840 psi490 psi
Elongation @ Break1,000 %4 %600 %
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® ONYX™ FASTMold Max™ 14NV
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
  • Silicone Rubber - Tin Cure
Mixed Viscosity13,000 cps100 cps7,500 cps
Mix Ratio By Volume1A:1B100A:100B
Mix Ratio By Weight1A:1B120A:100B100A:10B
Pot Life1 minute2.5 minutes40 minutes
Cure Time5 minutes15 minutes4 hours
Shore D Hardness80
Shore A Hardness514
Specific Gravity1.07 g/cc1.09 g/cc1.12 g/cc
Specific Volume25.8 cu. in./lb.27.7 cu. in./lb.24.7 cu. in./lb.
ColorTranslucentBlackWhite
Die B Tear Strength75 pli87 pli
Tensile Strength350 psi5,840 psi490 psi
Tensile Modulus246,000 psi
Elongation @ Break1,000 %4 %600 %
100% Modulus15 psi35 psi
Compressive Strength8,760 psi
Compressive Modulus77,400 psi
Flexural Strength8,280 psi
Flexural Modulus246,000 psi
Shrinkage<.001 in. / in.0.010 in. / in.0.002 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)450 °F400 °F
Dielectric Constant, 100Hz3.4
Volume Resistivity9.000000E+14 ohm/cm
Thermal Conductivity0.21 W/M*K
Dielectric Strength>500 volts/mil
Dissipation Factor, 100Hz0.02
Heat Deflection With Post Cure250 °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® ONYX™ FAST

Smooth-Cast® ONYX™ is a mercury-free urethane resin that cures at room temperature to a deep black, solid plastic. ONYX™ resins offer the convenience of a 1A:1B by volume mix ratio and have very low viscosities, so they are easy to mix and pour. ONYX™ resins have an ultimate Shore hardness of 80D and offer higher physical properties and higher heat resistance vs. other general purpose resins.ONYX™ FAST resin has a pot life of 2.5 minutes and a cure time of 10-15 minutes. ONYX™ FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects.

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Mold Max™ 14NV

Mold Max™ 14NV is a Shore 14A tin-catalyzed silicone rubber that offers low viscosity, fast cure and long library life. Mold Max™ 14 NV does not require vacuum degassing. Mix ratio is 100A:10B by weight. Working time is 40 minutes and cure time is 4 hours at room temperature. Mold Max™ 14NV will reproduce the finest detail and is suitable for a variety of industrial and art related applications including making molds for reproducing prototypes, furniture, sculpture and architectural elements.

Mold Max™ 14NV can also be used to create movie special effects. Cure time can be reduced with Accel-T™ cure accelerator. Mold Max™ 14NV can be used to cast a variety of materials including concrete, wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins.

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