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Smooth-Cast® 300Q

EZ-Spray® Silicone 22 vs. EZ-Spray® Foam vs. Smooth-Cast® 300QEZ-Spray® Silicone 22 versus EZ-Spray® Foam

Bright White, Ultra Low Viscosity Liquid Plastic

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Urethane Resins
Mixed Viscosity11,000 cps400 cps80 cps
Pot Life5 minutes13 seconds30 seconds
Cure Time45 minutes10 minutes5 minutes
Shore D Hardness70
Shore A Hardness22
Specific Gravity1.08 g/cc0.128 g/cc1.05 g/cc
ColorTranslucent GreenTanWhite
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 22EZ-Spray® FoamSmooth-Cast® 300Q
Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Urethane Resins
Mixed Viscosity11,000 cps400 cps80 cps
Mix Ratio By Volume1A:1B1A:1B1A:1B
Mix Ratio By Weight100A:90B
Pot Life5 minutes13 seconds30 seconds
Tack Free Time2 minutes
Cure Time45 minutes10 minutes5 minutes
Shore D Hardness70
Shore A Hardness22
Expansion (approximate)7 times
Specific Gravity1.08 g/cc0.128 g/cc1.05 g/cc
Specific Volume25.6 cu. in./lb.26.4 cu. in./lb.
ColorTranslucent GreenTanWhite
Die B Tear Strength102 pli
Tensile Strength490 psi3,000 psi
Tensile Modulus139,500 psi
Elongation @ Break450 %5 %
100% Modulus49 psi
Compressive Strength4,000 psi
Compressive Modulus45,800 psi
Flexural Strength4,510 psi
Flexural Modulus128,000 psi
Shrinkage<.001 in. / in.0.01 in. / in.
Heat Deflection Temp120 °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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EZ-Spray® Foam

EZ~Spray® Foam is a polyurethane foam compound that can be conveniently sprayed using Smooth-On’s EZ~Spray® Junior System. Foam cures quickly to strong, lightweight and impact resistant 8 lb. rigid foam that can be used for a variety of applications including making lightweight castings. Foam can also be sprayed over certain rubber mold configurations as a mother mold material. For more information, refer to SmoothOn’s EZ~Spray® Junior manual and video.

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Smooth-Cast® 300Q

 

Smooth-Cast® 300Q liquid plastic is a quick setting, ultra-low viscosity casting resin that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. It offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. 

This resin readily accept fillers (such as URE-FIL® 3 from Smooth-On) and can be colored with SO-Strong® or Ignite® color tints (Smooth-Cast® 325 series accepts pigments better than the Smooth Cast® 300 series). Fully cured castings are tough, durable, machinable and paintable. It resists moisture and mild solvents. Applications for Smooth-Cast® 300Q Liquid Plastics include reproducing small to medium size sculptures, casting into alginate molds, making prototype models, special effect props and decorative jewelry. 

Those interested in making roto cast pieces should refer to the Smooth-Cast® 65D technical bulletin.

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Silicone Rubber - Tin Cure ›

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Urethane Rubber ›

Polysulfide Rubber ›

Urethane Resins ›

Epoxy Casting and Laminating Resins ›

Epoxy Putties ›

Epoxy and Urethane Coatings ›

Mix and Pour Expanding Foams ›

Adhesives ›

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