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PC-3®

EZ-Spray® Silicone 22 vs. Metal‌set® A4 vs. PC-3®EZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Metal‌set® A4

EZ-Spray® Silicone 22 vs. Metal‌set® A4 vs. PC-3®EZ-Spray® Silicone 22 versus PC-3®

High performance epoxy adhesive

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Adhesives
Mixed Viscosity11,000 cpsPastePaste
Pot Life5 minutes20 minutes22 minutes
Cure Time45 minutes24 hours16 hours
Barcol 935 Hardness7571
Shore A Hardness22
Specific Volume25.6 cu. in./lb.20 cu. in./lb.19.5 cu. in./lb.
ColorTranslucent GreenBlackMetallic
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®Metal‌set® A4
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Adhesives
Mixed Viscosity11,000 cpsPastePaste
Mix Ratio By Volume1A:1B1A:1B1A:1B
Mix Ratio By Weight1A:1B1A:1B
Pot Life5 minutes20 minutes22 minutes
Cure Time45 minutes24 hours16 hours
Barcol 935 Hardness7571
Shore A Hardness22
Specific Gravity1.08 g/cc1.4 g/cc1.43 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.19.5 cu. in./lb.
ColorTranslucent GreenBlackMetallic
Die B Tear Strength102 pli
Tensile Strength490 psi3,000 psi3,600 psi
Tensile Modulus165,000 psi
Elongation @ Break450 %1.2 %
100% Modulus49 psi
Compressive Strength7,500 psi
Compressive Modulus160,000 psi
Flexural Strength5,000 psi
Shrinkage<.001 in. / in.0.003 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °F
Sag Resistance1/4 in.
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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Metal‌set® A4

Metalset® A4 is a powerful epoxy adhesive that has been used for years by all branches of the U.S. Military as well as every major airline and auto manufacturer in the world. Metalset® A4 is used for hundreds of industrial bonding applications and offers excellent adhesion to porous or non-porous surfaces. It can be applied to vertical surfaces without sagging and cures overnight with negligible shrinking.

Once cured, Metal‌set® A4 offers good machining qualities (sanding, drilling, tapping), and resists alkalies, dilute acids and solvents. Applications include stopping leaks in pipes, valves and tanks (i.e. car gas tanks), bonding like and unlike surfaces, filling metal joints, dents, etc., anchoring bolts in wood, concrete, and repairing metal surfaces.

Bell Spec - Metalset A4 meets all quality requirements and can be certified to Bell Spec 299-947-099 Rev. D (see below for details)

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