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Smooth-Sil™ 945

Smooth-Sil™ 945 vs. EZ-Spray® Silicone 22EZ-Spray® Silicone 22

Addition Cure Silicone Rubber Compounds

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Key Differences

Mixed Viscosity11,000 cps30,000 cps
Pot Life5 minutes25 minutes
Cure Time45 minutes6 hours
Shore A Hardness2245
ColorTranslucent GreenPurple
Tensile Strength490 psi700 psi
Elongation @ Break450 %320 %
100% Modulus49 psi260 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™ 945
Product Type
  • Silicone Rubber - Platinum Cure
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cps30,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B
Pot Life5 minutes25 minutes
Cure Time45 minutes6 hours
Shore A Hardness2245
Specific Gravity1.08 g/cc1.24 g/cc
Specific Volume25.6 cu. in./lb.22.3 cu. in./lb.
ColorTranslucent GreenPurple
Die B Tear Strength102 pli120 pli
Tensile Strength490 psi700 psi
Elongation @ Break450 %320 %
100% Modulus49 psi260 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™ 945

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™ 945 offers the convenience of a 1A:1B by volume mix ratio and a fast 6 hour cure time.

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

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