NOVELTY - Photocurable fluoropolyether-based gel composition comprises: polyfluoroalkyl compound having a perfluoroalkyl polyether structure in the main chain containing at least two alkenyl groups per molecule; polyfluoromonoalkenyl compound having a perfluoroalkyl polyether structure in the main chain containing one alkenyl group per molecule; a fluorine-containing organo hydrogen siloxane compound in which two hydrogen atoms are directly connected to silicon atoms in the molecule; and light-active hydrosilylation catalyst.    USE - The photocurable fluoropolyether-based gel composition is useful for forming a cured product, which is useful as a material for an automobile, a chemical plant, an inkjet printer, a semiconductor manufacturing line, physical and chemical analysis equipments, a medical machine, an aircraft, an organic electroluminescent panel, and fuel cell (all claimed).    ADVANTAGE - The composition exhibits excellent solvent resistance, chemical resistance, heat resistance, low-temperature characteristics, low moisture permeability, and electrical characteristics.    DETAILED DESCRIPTION - Photocurable fluoropolyether-based gel composition comprises: polyfluoroalkyl compound having a perfluoroalkyl polyether structure in the main chain containing at least two alkenyl groups per molecule; polyfluoromonoalkenyl compound having a perfluoroalkyl polyether structure in the main chain containing one alkenyl group per molecule; a fluorine-containing organo hydrogen siloxane compound in which two hydrogen atoms are directly connected to silicon atoms in the molecule, where the fluorine-containing organo hydrogen siloxane compound comprises 0.5-3 mole of silicon-hydrogen (Si-H) groups about 1 mole of alkenyl groups in the compound; and light-active hydrosilylation catalyst. INDEPENDENT CLAIMS are included for:    (1) photo-curing method comprising curing the polyether-based gel composition with light having a maximum peak wavelength of 300-400 nm; and    (2) cured product obtained by curing the composition.