Smooth-On OOMOO 30 is an easy to use condensation (tin) cure silicone rubber compound that features convenient one-to-one by volume mix ratios (no scale necessary).Oomoo has very low viscosity for easy mixing and pouring, and vacuum degassing is not necessary.Oomoo cures at room temperature with negligible shrinkage.OOMOO silicones do not have great tear strength, but are good for making simple one or two piece block moulds.OOMOO 25 is a faster version of Oomoo 30.colour: Lavender