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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Epoxy Casting and Laminating Resins
Mixed Viscosity11,000 cps400 cps23,000 cps
Mix Ratio By Volume1A:1B1A:1BN/A (gram scale required)
Pot Life5 minutes13 seconds3.5 hours
Cure Time45 minutes10 minutes24 hours
Shore D Hardness90
Shore A Hardness22
Specific Gravity1.08 g/cc0.128 g/cc1.66 g/cc
ColorTranslucent GreenTanGrey
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 22EZ-Spray® FoamEpoxAcast™ 655 + 103 Hardener
Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Epoxy Casting and Laminating Resins
Mixed Viscosity11,000 cps400 cps23,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:12B
Pot Life5 minutes13 seconds3.5 hours
Tack Free Time2 minutes
Cure Time45 minutes10 minutes24 hours
Shore D Hardness90
Shore A Hardness22
Expansion (approximate)7 times
Specific Gravity1.08 g/cc0.128 g/cc1.66 g/cc
Specific Volume25.6 cu. in./lb.16.7 cu. in./lb.
ColorTranslucent GreenTanGrey
Die B Tear Strength102 pli
Tensile Strength490 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Elongation @ Break450 %
100% Modulus49 psi
Compressive Strength12,500 psi
Compressive Modulus125,500 psi
Flexural Strength7,660 psi
Flexural Modulus1,403,000 psi
Shrinkage<.001 in. / in.0.0006 in. / in.
Heat Deflection Temp135 °F
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °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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EZ-Spray® Foam

EZ~Spray® Foam is a polyurethane foam compound that can be conveniently sprayed using Smooth-On’s EZ~Spray® Junior System. Foam cures quickly to strong, lightweight and impact resistant 8 lb. rigid foam that can be used for a variety of applications including making lightweight castings. Foam can also be sprayed over certain rubber mold configurations as a mother mold material. For more information, refer to SmoothOn’s EZ~Spray® Junior manual and video.

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EpoxAcast™ 655 + 103 Hardener

EpoxAcast™ 655 (formerly Metalset™ A-30) is a versatile aluminum filled castable epoxy that is very hard and strong. It is dimensionally stable, even when mass cast up to 512 in3 / 8,390 cm3.

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Silicone Rubber - Tin Cure ›

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Epoxy Casting and Laminating Resins ›

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Mix and Pour Expanding Foams ›

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Lifecasting Materials ›

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