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PC-3®

Mold Max™ XLS™ II vs. EZ-Spray® Silicone 22 vs. PC-3®EZ-Spray® Silicone 22

Laboratory Tabletop Epoxy Adhesive

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Mold Max™ XLS™ II

Mold Max™ XLS™ II vs. EZ-Spray® Silicone 22 vs. PC-3®EZ-Spray® Silicone 22 versus PC-3®

eXtra Low-Shrinkage Silicone Mold Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Tin Cure
Mixed Viscosity11,000 cpsPaste30,000 cps
Mix Ratio By Volume1A:1B1A:1BN/A (gram scale required)
Pot Life5 minutes20 minutes40 minutes
Cure Time45 minutes24 hours24 hours
Barcol 935 Hardness75
Shore A Hardness2230
Specific Volume25.6 cu. in./lb.20 cu. in./lb.22.7 cu. in./lb.
ColorTranslucent GreenBlackBlue
Tensile Strength490 psi3,000 psi550 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 Max™ XLS™ II
Product Type
  • Silicone Rubber - Platinum Cure
  • Adhesives
  • Silicone Rubber - Tin Cure
Mixed Viscosity11,000 cpsPaste30,000 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight1A:1B100A:10B
Pot Life5 minutes20 minutes40 minutes
Cure Time45 minutes24 hours24 hours
Barcol 935 Hardness75
Shore A Hardness2230
Specific Gravity1.08 g/cc1.4 g/cc1.22 g/cc
Specific Volume25.6 cu. in./lb.20 cu. in./lb.22.7 cu. in./lb.
ColorTranslucent GreenBlackBlue
Die B Tear Strength102 pli110 pli
Tensile Strength490 psi3,000 psi550 psi
Elongation @ Break450 %375 %
100% Modulus49 psi95 psi
Flexural Strength5,000 psi
Shrinkage<.001 in. / in.0.003 in. / in.0.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)500 °F400 °F
Thermal Conductivity0.24 W/M*K
Volume Resistivity9.000000E+15 ohm/cm
Compressive Yield Strength5,000 psi
Dielectric Constant, 100Hz3.4
Dielectric Strength>360 volts/mil
Dissipation Factor, 100Hz0.002

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 Max™ XLS™ II

Mold Max™ XLS™ II is a Shore 30A tin-catalyzed silicone mold rubber that exhibits very low long-term shrinkage. XLS™ II molds last longer than other silicones in production when casting chemically harsh resins such as epoxies and polyesters as well as urethane foams.

Mix ratio is 100A:10B by weight. Pot life is 40 minutes and cure time is 24 hours at room temperature. Mold Max™ XLS™ II silicone will reproduce the finest detail and is suitable for a variety of industrial and art related applications including making production molds for, reproducing prototypes, furniture, sculpture and architectural elements. Mold Max™ XLS™ II can be thickened with THI‑VEX™ additive for brush-on applications.

Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.

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