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Specialty Compounds RTP Company

Reynolds Mold Star® 30 Platinum Silicone Rubbers
Categories: Polymer; Thermoset; Silicone; Silicone Rubber

Material Notes: Product Overview: Mold Star™ rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold Star™ silicones feature relatively low viscosities and vacuum degassing is not required for most applications. The pot life of Mold Star™ 15 SLOW is 50 minutes and cure time is 4 hours at room temperature. Mold Star™ 16 FAST is a faster material with a 6 minute pot life and 30 minute cure time. Mold Star™ 30 is a harder material, with a 30A Shore hardness. Mold Star™ silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Molds made with Mold Star™ will last a long time in your mold library and are good for casting wax, gypsum, resins, and other materials. Cured Mold Star™ rubber is heat resistant up to 450°F (232°C) and is suitable for casting low-temperature melt metal alloys.

Information provided by Reynolds Advanced Materials

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Physical PropertiesMetricEnglishComments
Specific Gravity 1.12 g/cc1.12 g/ccASTM D-1475
Viscosity 12500 cP12500 cPMixed; ASTM D-2393
Linear Mold Shrinkage <= 0.0010 cm/cm<= 0.0010 in/inASTM D-2566
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 3030ASTM D-2240
Tensile Strength 2.90 MPa420 psiASTM D-412
Elongation at Break 339 %339 %ASTM D-412
100% Modulus 0.662 MPa96.0 psiASTM D-412
Tear Strength 15.4 kN/m88.0 pliDie B; ASTM D-624
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 232 °C450 °F
Minimum Service Temperature, Air -53.0 °C-63.4 °F
 
Processing PropertiesMetricEnglishComments
Cure Time 360 min6.00 hour
Pot Life 45.0 min45.0 minASTM D-2471
 
Descriptive Properties
ColorBlue
Mix Ratio1A:1Bby volume
 1A:1Bby weight
Specific Volume24.7[cu. in./lb.]

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PREYN116 / 296817

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