TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The curable perfluoropolyether gel composition further comprises at least one perfluoropolyether compounds of formula (A-O-(CF2CF2CF2O)d-A) (II), (A-O-(CF2O)f-(CF2CF2O)h-A) (III) or (A-O-(CF2O)i-(CF(CF3)CF2O)j-A) (IV). In the curable perfluoropolyether gel composition, a penetration of a cured product of the gel composition according to JIS K2220 or ASTM D-1403 is 1-200, and an amount of a cured product of the gel composition remaining in solid state after immersing in concentrated sulfuric acid (98%) at 40 degrees C for 1000 hours is at least 90%.A = (CxF2x+1)-;x = 1-3;d = 1-500; andf, h, i and j = 1-300. EXAMPLE - Typical curable perfluoropolyether gel composition comprised of (in parts by weight): (2S,5S,10R,13R)-N1,N14-Bis(3-(dimethyl(vinyl)silyl)propyl)-2,4,4,5,7,7,8,8,10,11,11,13-dodecafluoro-N1-phenyl-2,5,10,13-tetrakis(trifluoromethyl)-3,6,9,12-tetraoxatetradecane-1,14-diamide of formula (a1) (where average of m+n is 95) (73); (71R)-64-(1,1-difluoroethyl)-N-(3-(dimethyl(vinyl)silyl)propyl)-2,4,5,5,7,8,8,10,11,11,13,14,14,16,17,17,19,20,20,22,23,23,25,26,26,28,29,29,31,32,32,34,35,35,37,38,38,40,41,41,43,44,44,46,47,47,49,50,50,52,53,53,55,56,56,58,59,59,61,62,62,64,65,65,67,68,68,70,70,71,73,73,74,74,75,75,75-heptaheptacontafluoro-N-phenyl-2,4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,67,71-tricosakis(trifluoromethyl)-3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72-tetracosaoxapentaheptacontan-1-amide (27); solution in toluene of platinum-divinyl tetramethyl disiloxane complex (platinum content of 0.5%) (0.12); 50% toluene solution of ethynylcyclohexanol (0.12); and 2,2,4,4,5,7,7,8,10,10,11,13,13,14,16,16,17,19,19,20,22,22,23,25,25,26,28,28,29,31,31,32,34,34,35,37,37,38,40,40,41,43,43,44,46,46,47,49,49,50,52,52,53,55,55,56,58,58,59,61,61,62,64,64,65,67,67,68,70,70,71,73,73,74,74,74-hexaheptacontafluoro-N-(3-((2-(6-hydroxy-2,4,10-trimethyl-1,3,5,2,4,6,10-trioxatetrasilecan-6-yl)ethyl)dimethylsilyl)phenyl)-N-methyl-5,8,11,14,17,20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,71-tricosakis(trifluoromethyl)-3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72-tetracosaoxatetraheptacontan-1-amide (25.4).