TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The filler (e) is aqueous magnesium silicate, calcium carbonate, aluminum oxide, silica crystals and/or fumed silica. The ion trapping agent (g) is bismuth oxide-type, antimony oxide-type, titanium phosphate-type, zirconium phosphate-type and/or hydrotalcite-type ion trapping agents.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The sealing agent further contains filler (e), silane coupling agent (f) and ion trapping agent (g). Preferred Components: The thermosetting agent (b) is hydrazide, amine, anhydride, imidazole and/or polyhydric phenol. The epoxy (meth)acrylate (c) is bisphenol A epoxy (meth)acrylate, novolak-type epoxy (meth)acrylate or (meth)acrylate of resorcinol. The photoinitiator (d) is acetophenone-type, benzoin, benzophenone, thioxanthone, carbazole, anthraquinone, acylphosphine and/or acridine-type photoinitiator. The silane coupling agent (f) is glycidyl ethoxy silane or glycidyl methoxy silane. EXAMPLE - Acrylic acid was reacted with RE-404P (RTM: bisphenol F-type epoxy resin having epoxy equivalent of 160 g/equivalent and hydrolysis chlorine content of 30 ppm). The resulting mixture was subjected to liquid separation, and bisphenol F epoxy acrylate was obtained. The obtained bisphenol F epoxy acrylate (in wt.pts) (80), epoxy resin (20) having viscosity of 113400 mPa.second at 25degreesC and epoxy equivalent of 238 g/equivalent, Adeka Optomer N-1414 (RTM: 3,6-bis(2-methyl-2-morpholino propionyl)-9-n-octyl carbazole as radical generation-type photoinitiator) (1.8), and KBM-603 (RTM: N-beta(amino ethyl)-gamma-amino propyl trimethoxysilane as amino silane-coupling agent) (1.2), were heat-dissolved at 90degreesC and cooled to room temperature. Pulverized substance of IDH-S (RTM: isophthalic acid dihydrazide) (4.1) having melting point of 224degreesC, active hydrogen equivalent of 48.5 g/equivalent, average particle diameter of 1.7 microns and maximum particle size of 7 microns, Crystallite 1FF (RTM: molten silica having average particle diameter of 1 microns) (30) and IXE-100 (RTM: zirconium phosphate-type ion trapping agent) (1), were added to the cooled solution, to obtain sealing agent. The obtained sealing agent had viscosity of 300 Pa.second at 25degreesC. The sealing agent provided sealing portion with excellent adhesion strength, moisture resistance reliability and flexibility.