RTV Silicone Rubber is specially used for mold making applications where greater dimension stability is required. It has excellent tear strength. It is 2 component system which cures in 24 hours @ 25C. To accelerate curing process, elevated temperature may be used (at 60C for 120 min or 170C for 10 min). It can be used to cast epoxy, polyester, soap, concrete, candies, Polyurethane, cement, fiberglass resin, etc.RTV-A and RTV-B both will be came in a pack.Specification:Uncured propertiesBase Compound: RTV-AAppearance: TranslucentViscosity (at 23°C, mPa.s): 51500Cure Agent: RTV-BAppearance: TransparentViscosity (at 23C mPa.s): 300Cured Properties (23C, 24 hrs.)Appearance: TranslucentMixing Ration (RTV-A : RTV-B): 10:1 by weightMixed Viscosity (at 23C, mPa.s): 26000Work Time (min at 23C): 60Demold Time (hours at 23C): 6Hardness (Type-A): 40Tensile Strength (MPa /PSI): 6.5/942Elongation (%): 450Tear strength B type (N/mm): 20User Guide:Weight Properly both grades and accordingly mix as per ration suggestedAfter mixing extract remaining entrap air with help of vacuum chamberIf you do not have vacuum chamber than brush spread uniformly over the surface of the master first until all air pockets on the surface have been removedStart pouring the mixture properly on the master till it is completely coveredThe mold after pouring can be placed in degassing chamber if required to further remove entrapped air if anyOnce the rubber cures completely separate the master & silicone mold, curing time depend upon size of mold, but 8 – 12 hrs. are recommended for best resultCuring time also can be shortened by provision of heat during curing process
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