RTV SILICONE PASTE

In a polydiorganosilixane composition which is capable of storage in the absence of moisture and can be cured at ambient temperature under the action of water or moisture to give elastomers, the composition comprising a diorganosiloxane having reactive terminal groups, a diorganosilane having groups which are sensitive to hydrolysis, a cross-linking agent, and optionally fillers which have a thixotropic effect, condensation catalysts and/or other known auxiliaries, the improvement which comprises employing as the silane (a) a silane of the formula RR1Si(NR2R3)2 plus (b) an organosilane of the formula RSi (O-N=R4)3 in which R, R1, R2 and R3 each independently is alkyl, aryl, aralkyl and vinyl groups, or R2 and R3 together can be an alkanediyl radical having up to 8 C atoms or hydrogen, and R4 is an R2R3C group having up to 8 C atoms. The composition cures at room temperature in the presence of moisture to elastomers of desirable physical properties.