TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The composition further comprises (F) at least one perfluoropolyether compound selected from compounds of formulae A-O-(CF2CF2CF2O)a-A (I), A-O-(CF2O)c-(CF2CF2O)d-A (II), and A-O-(CF2O)e-(C(CF3)FCF2O)f-A (III).A=group of formula CbF2b+1-;a=1-500;b=1-3;c and d=1-300;e and f=1-300.Preferred Components: The component (A) is a partially branched linear polyfluoro compound of formula CH2=CH-(X)g-Rf1-(X')g-CH=CH2 (IV). The fluorinated organohydrogensiloxane (C) contains at least one monovalent perfluoroalkyl, monovalent perfluorooxyalkyl, divalent perfluoroalkylene or divalent perfluorooxyalkylene group per molecule. The fluorinated acetylene alcohol (E) is of formula Rf2-C(=O)-O-CH2-Q-C(OH)(R3)-C?=CH (V) or Rf2-Z'-Si(R4)(R5)-O-CH2-Q-C(OH)(R3)-C?=CH (VI).X=-CH2-, -CH2O-, -CH2OCH2- or -Y-NR1-CO-;Y'=-CH2-, -Si(CH3)2CH2CH2CH2-, -Si(CH3)(CH=CH2)CH2CH2CH2-, or an o-, m- or p-dimethylsilylphenylene group of formula (i);R1=H or optionally substituted monovalent hydrocarbon group;X'=-CH2-, -OCH2-, -CH2OCH2- or -CO-NR2-Y'-;Y'=-CH2-, -CH2CH2CH2Si(CH3)2-, -CH2CH2CH2Si(CH3)(CH=CH2)-, or an o-, m- or p-dimethylsilylphenylene group of formula (ii);R2=R1;R'f1=divalent perfluoropolyether group of formula -CtF2t(OCF2C(CF3)F)pOCF2(CF2)rCF2O(C(CF3)FCF2O)qCtF2t- (ia) or -CtF2t(OC(CF3)FCF2)u(OCF2)vOCtF2t- (iia);p and q=1-150;p+q=2-200;r=0-6;t=2 or 3;u=1-200;v=1-50;g=0 or 1;Rf2=3-100C perfluoroalkyl group, which may be separated by an ether bond and which may be branched;Q=divalent 1-6C hydrocarbon group;R3, R4 and R5=1-4C alkyl;Z'=divalent 1-20C organic group. EXAMPLE - A planetary mixer was charged with 58 parts polymer of formula (A), 17 parts a polymer of formula (B), and 25 parts Demnum S-65 (RTM: perfluoropolyether oil). The contents were mixed until uniform. To the mixture, 0.02 part ethanol solution of platinum-divinyltetramethyldisiloxane complex, 0.12 part fluorinated acetylene alcohol of formula CF3-CF2-CF2-O-CF(CF3)-CF2-O-CF(CF3)-CH2-O-CH2-CH2-CH2-Si(CH2CH2CH2CH3)(CH2CH2CH2CH3)-O-CH2-CH2-C(OH)(CH3)-C?=CH (C), and 18.4 parts fluorinated organohydrogensiloxane of formula (D) were added in sequence and mixed until uniform, and a curable composition was yielded, where weight average molecular weight is 90.