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PC-3®

Smooth-Sil™ 950 vs. EZ-Spray® Silicone 22 vs. PC-3®EZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Smooth-Sil™ 950

Smooth-Sil™ 950 vs. EZ-Spray® Silicone 22 vs. PC-3®EZ-Spray® Silicone 22 versus PC-3®

Addition Cure Silicone Rubber Compounds

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cpsPaste35,000 cps
Mix Ratio By Volume1A:1B1A:1BN/A (gram scale required)
Pot Life5 minutes20 minutes45 minutes
Cure Time45 minutes24 hours18 hours
Barcol 935 Hardness75
Shore A Hardness2250
Specific Volume25.6 cu. in./lb.20 cu. in./lb.22.3 cu. in./lb.
ColorTranslucent GreenBlackBlue
Tensile Strength490 psi3,000 psi725 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-Sil™ 950
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cpsPaste35,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:10B
Pot Life5 minutes20 minutes45 minutes
Cure Time45 minutes24 hours18 hours
Barcol 935 Hardness75
Shore A Hardness2250
Specific Gravity1.08 g/cc1.4 g/cc1.24 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.22.3 cu. in./lb.
ColorTranslucent GreenBlackBlue
Die B Tear Strength102 pli155 pli
Tensile Strength490 psi3,000 psi725 psi
Elongation @ Break450 %320 %
100% Modulus49 psi272 psi
Flexural Strength5,000 psi
Shrinkage<.001 in. / in.0.003 in. / in.<.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)500 °F450 °F
Compressive Yield Strength5,000 psi
Thermal Conductivity0.261 W/M*K

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-Sil™ 950

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™ Platinum Silicones are used for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete. Smooth-Sil™ 950 is suitable for food related applications. 

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