Abstract: A water repellent for application to glass, comprising disilazane with the general formula ##STR1## in which n and n' are the same or different integers having values from 2 to 20, and water-repellent glass whose surface has been treated with said water repellent.

Abstract: There is disclosed a polyolefin composition which can be extruded at relatively high rates to provide extrudate having improved hydrophobicity, said composition comprising (A) 100 parts by weight of a thermoplastic resin; and (B) at least 1 part by weight of an interactive diorganopolysiloxane process aid, said diorganopolysiloxane having a number average molecular weight of at least 10,000.

Abstract: There is disclosed a polyolefin composition which can be extruded at relatively high rates to provide extrudate having improved hydrophobicity, said composition comprising(A) 100 parts by weight of a polythylene resin; and(B) 1 to 5 parts by weight of an interactive diorganopolysiloxane process aid, said diorganopolysiloxane having a number average molecular weight of at least 10,000. In particularly preferred embodiments, an interactive diorganopolysiloxane in combination with a low density polyethylene is used as a process aid for linear low density polyethylene.