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PC-3®

EZ-Spray® Silicone 22 vs. PC-3® vs. Mold Star™ 31TEZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Mold Star™ 31T

EZ-Spray® Silicone 22 vs. PC-3® vs. Mold Star™ 31TEZ-Spray® Silicone 22 versus PC-3®

1A:1B Mix By Volume Translucent Platinum Silicone Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cpsPaste11,000 cps
Pot Life5 minutes20 minutes5 minutes
Cure Time45 minutes24 hours23 minutes
Barcol 935 Hardness75
Shore A Hardness2230
Specific Volume25.6 cu. in./lb.20 cu. in./lb.25.6 cu. in./lb.
ColorTranslucent GreenBlackTranslucent
Tensile Strength490 psi3,000 psi420 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®Mold Star™ 31T
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cpsPaste11,000 cps
Mix Ratio By Volume1A:1B1A:1B1A:1B
Mix Ratio By Weight1A:1B1A:1B
Pot Life5 minutes20 minutes5 minutes
Cure Time45 minutes24 hours23 minutes
Barcol 935 Hardness75
Shore A Hardness2230
Specific Gravity1.08 g/cc1.4 g/cc1.08 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.25.6 cu. in./lb.
ColorTranslucent GreenBlackTranslucent
Die B Tear Strength102 pli90 pli
Tensile Strength490 psi3,000 psi420 psi
Elongation @ Break450 %400 %
100% Modulus49 psi47 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

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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Mold Star™ 31T

Mold Star31T is an easy to use Shore 30A translucent platinum silicone that is mixed 1A:1B by volume (no weighing scale necessary). It features a relatively low viscosity and vacuum degassing is not required for most applications. Pot life is 5 minutes and cure time is 23 minutes at room temperature.

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