Use of a composition comprising organofunctional siloxanes selected from: - an organofunctional siloxane having the formula XR 1 SiR 2 (OSiR 2) n+1 OSiR 3 wherein R is independently an organic group selected from halogen, hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is a divalent organic group; and n is an integer having a value of 2 to 100, - an organofunctional siloxane having the formula R 3 SiO(R 2 SiO) n SiR 2 R 2 SiR 2 (OSiR 2) n OSIR 3 wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 2 is a divalent organic group; and n is an integer having a value of 2 to 100, - an organofunctional siloxane having the formula (VIII) R 3 SiO(R 2 SiO) n ( SiR 2) R 1 S y R 1 (Si R 2)(OSiR 2) n OSiR 3 (VIII) wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is independently an organic group selected from alkyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl; n is an integer having a value of 2 to 100; and y is an integer having a value of 1 to 100; for the treatment of fillers. - an organofunctional siloxane having the formula XR 1 SiR 2 (OSiR 2) n+1 OSiR 3 wherein R is independently an organic group selected from halogen, hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is a divalent organic group; and n is an integer having a value of 2 to 100, wherein R is independently an organic group selected from halogen, hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is a divalent organic group; and n is an integer having a value of 2 to 100, - an organofunctional siloxane having the formula R 3 SiO(R 2 SiO) n SiR 2 R 2 SiR 2 (OSiR 2) n OSIR 3 wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 2 is a divalent organic group; and n is an integer having a value of 2 to 100, wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 2 is a divalent organic group; and n is an integer having a value of 2 to 100, - an organofunctional siloxane having the formula (VIII) R 3 SiO(R 2 SiO) n ( SiR 2) R 1 S y R 1 (Si R 2)(OSiR 2) n OSiR 3 (VIII) wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is independently an organic group selected from alkyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl; n is an integer having a value of 2 to 100; and y is an integer having a value of 1 to 100; wherein R is independently an organic group selected from hydrogen, hydroxyl, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl, and alkoxy, acyloxy, alkyloyl, carbinoyl acyloxy group, alkylamine, dialkylamine, oximino or enoxy; R 1 is independently an organic group selected from alkyl, cycloalkyl, aryl, arylalkyl, alkylaryl and dialklyaryl; n is an integer having a value of 2 to 100; and y is an integer having a value of 1 to 100;