Single-component silicone elastomer compositions crosslinkable into self-adhesive state

A single-component silicone elastomer composition which can be crosslinked by polyaddition (hydrosilylation) into self-adhesive state, consisting essentially of:

• α/ at least one polyorganosiloxane (POS) bearing one or more ethylenically and/or acetylenically sites of unsaturation, {POS having ≡Si-[unsaturation] units};
• β/ at least one polyorganosiloxane (POS) bearing ≡Si—H units;
• γ/ a catalyst system which comprises:
• γ.1 at least one metal catalyst;
• and
• γ.2 at least one crosslinking inhibitor;
• δ/ a filler;
• ε/ at least one adhesion promoter;
• ρ/ at least one POS resin;
• λ/ optionally, at least one heat stabilizer;
• and
• φ/ optionally, at least one other functional additive;
• wherein the crosslinking inhibitor γ.2 is an α-acetylenic alcohol having a boiling point above 250° C. and the molar ratio of the metal of the catalyst to the inhibitor ranges from 1/100 to 1/1000, and
• wherein said composition is stable at ambient temperature for several weeks to several months and said composition is capable of retaining, at least during the time required for crosslinking, the shape into which said composition is formed, when said composition is applied to substrates to be joined or sealed.