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PC-3®

Smooth-Cast® ONYX™ FAST vs. EZ-Spray® Silicone 22 vs. PC-3®EZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Urethane Resins
Mixed Viscosity11,000 cpsPaste100 cps
Pot Life5 minutes20 minutes2.5 minutes
Cure Time45 minutes24 hours15 minutes
Barcol 935 Hardness75
Shore D Hardness80
Shore A Hardness22
Specific Volume25.6 cu. in./lb.20 cu. in./lb.27.7 cu. in./lb.
ColorTranslucent GreenBlackBlack
Tensile Strength490 psi3,000 psi5,840 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 22PC-3®Smooth-Cast® ONYX™ FAST
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Urethane Resins
Mixed Viscosity11,000 cpsPaste100 cps
Mix Ratio By Volume1A:1B1A:1B100A:100B
Mix Ratio By Weight1A:1B120A:100B
Pot Life5 minutes20 minutes2.5 minutes
Cure Time45 minutes24 hours15 minutes
Barcol 935 Hardness75
Shore D Hardness80
Shore A Hardness22
Specific Gravity1.08 g/cc1.4 g/cc1.09 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.27.7 cu. in./lb.
ColorTranslucent GreenBlackBlack
Die B Tear Strength102 pli
Tensile Strength490 psi3,000 psi5,840 psi
Tensile Modulus246,000 psi
Elongation @ Break450 %4 %
100% Modulus49 psi
Compressive Strength8,760 psi
Compressive Modulus77,400 psi
Flexural Strength5,000 psi8,280 psi
Flexural Modulus246,000 psi
Shrinkage<.001 in. / in.0.003 in. / in.0.010 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °F
Heat Deflection With Post Cure250 °F
Compressive Yield Strength5,000 psi

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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PC-3®

Smooth-On PC-3® Laboratory Table Top Cement is a two-component, black epoxy resin compound designed to join, bond and caulk sections of laboratory counters and tables. This epoxy resin cement is heavily filled and will adhere to vertical surfaces without sagging. It cures at room temperature with extremely low shrinkage.

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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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