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Mold StarÂ® rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold StarÂ® silicones feature relatively low viscosities and vacuum degassing is not required for most applications. Mold StarÂ® silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Molds made with Mold StarÂ® will last a long time in your mold library and are good for casting wax, gypsum, resins, concrete and other materials. Cured Mold StarÂ® rubber is heat resistant up to 450Â°F (232Â°C) and is suitable for casting low-temperature melt metal alloys. Note: THI-VEXÂ® is NOT compatible with Mold StarÂ® rubbers. MOLD STAR 30: MIX RATIO: 1:1 by volume; POT LIFE: 45 mins; DEMOLD TIME: 6 hrs; SHORE A: 30; COLOR: Green Read the MSDS before using. Consult the Technical Bulletin for further information or visit us at www.smooth-on.com