Condensation (Tin catalysed) cured, 2 Part Room Temperature Vulcanised (RTV - 2) silicones use humidity in the open air for it to fully vulcanise. These silicones are best for general purpose uses where casting resins such as polyester, polyurethane, epoxy as well as polyurethane foams and low melting metals are to be cast.
Small amount of shrinkage occurs with these silicones.
Pourable in nature, they can be thickened into a brushable consistency with certain additives.