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PC-3®

EZ-Spray® Silicone 22 vs. PC-3® vs. Smooth-Cast® 57DEZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Smooth-Cast® 57D

EZ-Spray® Silicone 22 vs. PC-3® vs. Smooth-Cast® 57DEZ-Spray® Silicone 22 versus PC-3®

Semi-Rigid Urethane Casting Resin

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Urethane Resins
Mixed Viscosity11,000 cpsPaste300 cps
Pot Life5 minutes20 minutes3 minutes
Cure Time45 minutes24 hours30 minutes
Barcol 935 Hardness75
Shore D Hardness57
Shore A Hardness22
Specific Volume25.6 cu. in./lb.20 cu. in./lb.26.4 cu. in./lb.
ColorTranslucent GreenBlackTranslucent 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 22PC-3®Smooth-Cast® 57D
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Urethane Resins
Mixed Viscosity11,000 cpsPaste300 cps
Mix Ratio By Volume1A:1B1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:93B
Pot Life5 minutes20 minutes3 minutes
Cure Time45 minutes24 hours30 minutes
Barcol 935 Hardness75
Shore D Hardness57
Shore A Hardness22
Specific Gravity1.08 g/cc1.4 g/cc1.05 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.26.4 cu. in./lb.
ColorTranslucent GreenBlackTranslucent White
Die B Tear Strength102 pli
Tensile Strength490 psi3,000 psi
Ultimate Tensile2,420 psi
Elongation @ Break450 %100 %
100% Modulus49 psi
Flexural Strength5,000 psi
Shrinkage<.001 in. / in.0.003 in. / in.0.012 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °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® 57D

Smooth-Cast® 57D is a semi-rigid urethane plastic that offers a gradual cure profile (does not snap cure), making it suitable for machine or hand rotational casting.

Use For Rotational Casting - Once poured into a suitable rubber mold configuration, the mold can be rotated so that the resin mixture gradually coats the inside of the mold cavity. After an adequate wall thickness is attained inside the mold, the result is a cured hollow casting that is semi-rigid and highly impact resistant.

Use as a Casting Resin – Smooth-Cast® 57D can also be used as a casting resin for making solid, semi-rigid castings that are tough and durable.

Mix ratio is 1A:1B by volume. Working time is 3 minutes, demold time is 30 minutes and full cure properties are attained after 24 hours. Color is white translucent and the material is very easy to color with SO-Strong®, UVO® or Ignite® colorants. Cured resin is also easy to paint with acrylic paints or UreCoat® flexible coating for applications requiring thick, durable finishes.

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