UV stabilisation of a cross-linkable polyolefin composition comprising an acidic silanol condensation catalyst

The present invention relates to a polyolefin composition comprising (A) a cross-linkable polyolefin with hydrolysable silane groups; (B) and a silanol condensation catalyst characterized in that the ” F is more than 40 Nm and the cross-linking speed is more than 0.1 Nm/s in the ice test and retention of more than 60% of the elongation at break after 500 h in SEPAP UV exposure, further a polyolefin composition comprising (A) a cross-linkable polyolefin with hydrolysable silane groups; (B) an acidic silanol condensation catalyst, and (C) at least one UV stabilizer that is acidic, i.e. pH equal or less than 6.2, measured at 20-25 °C and with 1 wt% suspension; to an article comprising such a composition, and to the use of such a composition for the production of an article.