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Smooth-Sil™ 940

Smooth-Sil™ 940 vs. EZ-Spray® Silicone 22EZ-Spray® Silicone 22

Addition Cure Silicone Rubber Compounds

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Key Differences

Mixed Viscosity11,000 cps35,000 cps
Mix Ratio By Volume1A:1BN/A (gram scale required)
Pot Life5 minutes30 minutes
Cure Time45 minutes24 hours
Shore A Hardness2240
ColorTranslucent GreenPink
Elongation @ Break450 %300 %
100% Modulus49 psi200 psi
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

EZ-Spray® Silicone 22Smooth-Sil™ 940
Product Type
  • Silicone Rubber - Platinum Cure
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cps35,000 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight100A:10B
Pot Life5 minutes30 minutes
Cure Time45 minutes24 hours
Shore A Hardness2240
Specific Gravity1.08 g/cc1.18 g/cc
Specific Volume25.6 cu. in./lb.23.4 cu. in./lb.
ColorTranslucent GreenPink
Die B Tear Strength102 pli100 pli
Tensile Strength490 psi600 psi
Elongation @ Break450 %300 %
100% Modulus49 psi200 psi
Shrinkage<.001 in. / in.<.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)500 °F450 °F

Product Description

EZ-Spray® Silicone 22

EZ~Spray® Silicone 22 are sprayable silicones which cure quickly to soft rubbers with high elongation and tear strength. Liquid silicone is sprayed through the EZ~Spray® Junior Cartridge System which is an economical alternative to expensive spray equipment. After a suitable thickness is attained, EZ~Spray® Silicone 22 cures in about 45 minutes. EZ~Spray® Silicone cures with negligible shrinkage to strong, durable silicone rubbers good for production casting of polyester, epoxy or urethane resins, gypsum, concrete and other materials.

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Smooth-Sil™ 940

Smooth-On Smooth-Sil™ Platinum Silicones cure at room temperature with negligible shrinkage. With different hardnesses to choose from, Smooth-Sil™ products offer tremendous versatility and are suitable for making production molds of any configuration, large or small. These silicones exhibit good chemical, abrasion and heat resistance. Materials such as plasters, concrete, wax, low-melt metal alloys or resins (urethane, epoxy or polyester) can then be cast into these silicone rubbers without a release agent.

Smooth-Sil™ Platinum Silicones are used for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete. Smooth-Sil™ 940 is suitable for food related applications. 

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