Abstract: A method and composition for making a RTV organopolysiloxane composition including mixing in the following preferable order: at least one organopolysiloxane polymer molecule (component A), an organic silicon compound (component D), an organic silicon compound (component E), a first portion of an amino-functional silane or derivative of such substance (component C1), a finely divided hydrophobised silica filler (component B1), a finely divided hydrophilic silica filler (component B2), a second portion of an amino-functional silane or derivative of such substance, and an organic imine curing catalyst.

Abstract: A RTV organopolysiloxane composition comprising (A) an organopolysiloxane having at least two hydroxyl groups attached to the terminal silicon atoms of the molecule, (B) finely divided silicon dioxide, (C) an amino-functional silane containing at least one amino-group per molecule, (D) a silane crosslinking agent, (E) a trialkoxysilane, and (F) an organic imine or substituted imine.