cable strands protective composition structures

The invention concerns a protective composition obtained by slow polymerisation in situ, after injecting at room temperature into a sheath enclosing the strands of a cable, monomer or prepolymer reagents in the presence of a swelling solvent. The monomer reagents can be identical or different vinyl monomers polymerisable by free radical polymerisation, or bifunctional or trifunctional compounds of two different types reacting mutually resulting in bifunctional or trifunctional polymers, or still mixtures of said compounds. Said composition may further contain an anticorrosive agent. The solvent can be selected among esters of benzoic acid, phthalic acid or aliphatic acid saturated or unsaturated having in the aliphatic chain at least 10 carbon atoms, aromatic or polycyclic hydrocarbons, terpenes and phenolic esters optionally slightly polymerised. The resulting composition has viscoelastic properties which enables it to enhance the cable dampening.