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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cpsLight Paste
Pot Life5 minutes10 minutes
Cure Time45 minutes90 minutes
Shore D Hardness70
Shore A Hardness22
ColorTranslucent GreenOff White
Elongation @ Break450 %1.14 %
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 22Plasti-Paste® II
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cpsLight Paste
Mix Ratio By Volume1A:1B1A:2B
Mix Ratio By Weight62A:100B
Pot Life5 minutes10 minutes
Cure Time45 minutes90 minutes
Shore D Hardness70
Shore A Hardness22
Specific Gravity1.08 g/cc1.0 g/cc
Specific Volume25.6 cu. in./lb.27.73 cu. in./lb.
ColorTranslucent GreenOff White
Die B Tear Strength102 pli
Tensile Strength490 psi
Tensile Modulus235,000 psi
Ultimate Tensile2,150 psi
Elongation @ Break450 %1.14 %
100% Modulus49 psi
Compressive Strength4,980 psi
Compressive Modulus62,700 psi
Flexural Strength3,840 psi
Flexural Modulus203,000 psi
Shrinkage<.001 in. / in.0.005 in. / in.
Heat Deflection Temp130 °F
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °F

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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Plasti-Paste® II

New Plasti-Paste® II is a two component fiber-filled resin that is designed for vertical surface application. This no-odor formulation is an improved version of our original Plasti-Paste® formula, and the cured product is different in the following ways:

  1. Plasti-Paste II is now phthalate free.
  2. Cured plastic can be painted (original Plasti Paste® can not)
  3. It is harder, more rigid with better heat resistance.

Part A is a liquid and Part B is a paste. New Mix Ratio is 1A: 2B by volume (62A:100B by weight). Pot life is 10 minutes at room temperature depending on mass. Demold time (can be handled) is about 90 minutes at room temperature depending on mass. Full cure; 24 hours at room temperature. Cure time can be accelerated by applying heat.

Mixed material holds a vertical surface without sagging and cures to a strong, durable and lightweight plastic. Liquid material can be pigmented with So-Strong® color tints from Smooth-On. This plastic can be used for creating themed environments or special effects, used as a “mother mold” material to reinforce rubber molds and a variety of other applications. This plastic is also a powerful adhesive and can be used as a repair material for a variety of industrial applications. Cured plastic can be sanded, machined and painted with acrylic enamel paints.

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Silicone Rubber - Tin Cure ›

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