Polysiloxane, obtainable by means of the addition of at least one mono-vinyl functional polysiloxane and at least one epoxy-functional, mono-vinyl functional component to an Si-H functional polysiloxane, characterised in that the at least one mono-vinyl functional polysiloxane has the formula: wherein Z stands for hydrogen or an alkyl group with 1 to 4 carbon atoms and X stands for a monovalent radical of the following formula: wherein p = 0 or 1, q = 0 to 30 and r = 1 to 400 and if p = 1 then q ≥ 2, R a denotes a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms or an alkoxy alkylene oxide alkyl radical or alkoxy polyalkylene oxide alkyl radical, all R b, R c, R d and R e independently denote a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms, R d and R e can also independently denote R a [SiR b R c O] r wherein R a, R b, R c and r are as defined above and are selected irrespectively. Z stands for hydrogen or an alkyl group with 1 to 4 carbon atoms and X stands for a monovalent radical of the following formula: wherein p = 0 or 1, q = 0 to 30 and r = 1 to 400 and if p = 1 then q ≥ 2, R a denotes a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms or an alkoxy alkylene oxide alkyl radical or alkoxy polyalkylene oxide alkyl radical, all R b, R c, R d and R e independently denote a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms, R d and R e can also independently denote R a [SiR b R c O] r wherein R a, R b, R c and r are as defined above and are selected irrespectively. wherein p = 0 or 1, q = 0 to 30 and r = 1 to 400 and if p = 1 then q ≥ 2, R a denotes a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms or an alkoxy alkylene oxide alkyl radical or alkoxy polyalkylene oxide alkyl radical, all R b, R c, R d and R e independently denote a linear halogenated or non-halogenated alkyl radical having 1 to 30 carbon atoms, a branched or cyclic halogenated or non-halogenated alkyl radical having 3 to 30 carbon atoms or an aryl radical having 6 to 30 carbon atoms or an alkylaryl radical or an arylalkyl radical having 7 to 30 carbon atoms, R d and R e can also independently denote R a [SiR b R c O] r wherein R a, R b, R c and r are as defined above and are selected irrespectively.