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EpoxAcast™ 650 + HT Hardener

EZ-Spray® Silicone 22 vs. EZ-Spray® Foam vs. EpoxAcast™ 650 + HT HardenerEZ-Spray® Silicone 22 versus EZ-Spray® Foam

Mineral Filled General Purpose Casting Epoxy

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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 cps5,000 cps
Mix Ratio By Volume1A:1B1A:1BN/A (gram scale required)
Pot Life5 minutes13 seconds3 hours
Cure Time45 minutes10 minutes24 hours
Barcol 935 Hardness93
Shore A Hardness22
Specific Gravity1.08 g/cc0.128 g/cc1.52 g/cc
ColorTranslucent GreenTanOff White
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™ 650 + HT Hardener
Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Epoxy Casting and Laminating Resins
Mixed Viscosity11,000 cps400 cps5,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:10B
Pot Life5 minutes13 seconds3 hours
Tack Free Time2 minutes
Cure Time45 minutes10 minutes24 hours
Barcol 935 Hardness93
Shore A Hardness22
Expansion (approximate)7 times
Specific Gravity1.08 g/cc0.128 g/cc1.52 g/cc
Specific Volume25.6 cu. in./lb.18.22 cu. in./lb.
ColorTranslucent GreenTanOff White
Die B Tear Strength102 pli
Tensile Strength490 psi
Tensile Modulus1,079,000 psi
Ultimate Tensile6,900 psi
Elongation @ Break450 %
100% Modulus49 psi
Compressive Strength15,980 psi
Compressive Modulus134,400 psi
Flexural Strength10,850 psi
Flexural Modulus775,000 psi
Shrinkage<.001 in. / in.0.007 in. / in.
Heat Deflection Temp187 °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™ 650 + HT Hardener

EpoxAcast™ 650 is a mineral filled general purpose casting epoxy that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment.EpoxAcast™ 650 is used for making hard dies for metal stamping as well as patterns and fixtures. It is also used for electrical encapsulation to extend the life cycles and enhance the performance of potted electronic devices. The high compressive strength of EpoxAcast™ 650 makes it ideal for making stamping dies for production pressing of metal ornaments.

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