The present invention relates to an organo-functional polysiloxane of formula (1) wherein each R.sup.1 is independently selected from alkyl or aryl radicals, each R.sup.2 is independently selected from hydrogen, alkyl or aryl radicals, n is selected so that the molecular weight for the organo-functional polysiloxane is in the range of from 400 to 10,000, R.sup.3 is a bivalent radical or --O--W--(X).sub.z is hydroxy or alkoxy, z is 1, 2 or 3 and X is a reactive functional group for reacting with amine radicals and wherein 0 to 90% of --O--R.sup.3--(X).sub.z is hydroxy or alkoxy ##STR00001##