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Master Bond adhesives

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Reynolds Sorta-Clear® 12 Silicone Rubber Compounds
Categories: Polymer; Thermoset; Silicone; Silicone Rubber

Material Notes: Product Overview: SORTA-Clear™ Series rubbers are premium water white translucent silicone rubbers (platinum catalyst) which cure at room temperature with negligible shrinkage. Available in Shore 12A, 18A, 37A and 40A hardness, these rubbers feature high tensile and tear strength. SORTA-Clear™ 12 and SORTA-Clear™ 37 offer the convenience of a 1A:1B by volume mix ratio. The 18A and 40A products require a gram scale for measuring parts A + B. SORTA-Clear™ silicones are ideal for making prototype, jewelry or other molds of any configuration where model visibility is important (i.e. extracting a model from the mold via cutting). Materials such as urethane, epoxy or polyester resins can then be cast into SORTA-Clear™ silicone without application of a release agent. Other materials such as wax and low melt metal alloys can also be cast into SORTA-Clear™. SORTA-Clear™ can be pigmented with SILC Pig™ silicone pigments. SORTA-Clear™ 18, SORTA-Clear™ 37 and SORTA-Clear™ 40 are FOOD SAFE and can be used for culinary applications including casting chocolate and other confections. (See separate technical bulletin for usage instructions available at www.smooth-on.com). SORTA-Clear™ 12 is not food safe, and should not be used for food related applications. SORTA-Clear™ 18 is SKIN SAFE and certified by an independent laboratory.

Information provided by Reynolds Advanced Materials

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.07 g/ccASTM D-1475
Viscosity 6000 cPMixed; ASTM D-2393
Linear Mold Shrinkage <= 0.0010 in/inASTM D-2566
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 12ASTM D-2240
Tensile Strength 320 psiASTM D-412
Elongation at Break 590 %ASTM D-412
100% Modulus 23.0 psiASTM D-412
Tear Strength 80.0 pliDie B; ASTM D-624
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 232 °C
Minimum Service Temperature, Air -53.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 12.0 hour
Pot Life 40.0 minASTM D-2471
 
Descriptive Properties
ColorTranslucent
Mix Ratio1A:1Bby volume
 1A:1Bby weight
Specific Volume25.9[cu. in./lb.]

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PREYN132 / 296833

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