Dow Corning 3110, 3112 and 3120 RTV rubbers are pourable rubber bases that become firm, flexible silicone rubber when cured. There is a choice of three catalysts to select from in order to tailor your working times and cure rates. - These RTV rubbers are easily mixed and poured, cure at room temperature in any thickness, give accurate reproduction of masters for moldmaking, provide a wide service temperature range.