Curable composition

A curable composition comprising:

• (A) a compound which is a compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule, wherein
• the perfluoro(poly)ether group is a group represented by formula:
• —(OC6F12)a—(OC5F10)b—(OC4F8)c—(OC3X106)d—(OC2F4)e—(OCF2)f—
• wherein a, b, c and d are each independently an integer of 0 or more and 30 or less, e and f are each independently an integer of 1 or more and 200 or less, the sum of a, b, c, d, e and f is at least 5 or more, the occurrence order of the respective repeating units in parentheses with the subscript a, b, c, d, e or f is not limited in the formula, a ratio of e to f is 1.0 or more, and each X10, at each occurrence, is independently a hydrogen atom, a fluorine atom or a chlorine atom;
• (B) an organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule;
• and
• (C) a catalyst.