Mould Star rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary).Mould Star silicones feature relatively low viscosities and vacuum degassing is not required for most applications.Mould Star silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage.Moulds made with Mould Star will last a long time in your mould library and are good for casting wax, gypsum, resins, concrete and other materials.Cured Mould Star rubber is heat resistant up to 450CF (232C) and is suitable for casting low-temperature melt metal alloys.Note: THI-VEX is NOT compatible with Mould Star rubbers.mould STAR 20T: MIX RATIO: 1:1 by volume; POT LIFE: 6 minutes; DEMOLD TIME: 30 minutes; SHORE A: 20; colour: Transparent Read the MSDS before using.Consult the Technical Bulletin for further information or visit us at www.smooth-www.smo