a hot melt composition containing , as essential ingredients , a specific high - molecular weight styrene block copolymer , a specific polyphenylene ether resin and a viscosity adjuster . the hot melt composition permits an easy assembling and sealing between a plurality of members . more particularly , it is possible for the hot melt composition to be melted and applied to one member in advance of the assembling work , such that the one member with the hot melt composition already applied thereto can be carried into a work site or a work line and simply joined to another member at those places . further advantageously , the members joined or assembled via the hot melt composition can be disassembled without difficulty , which enables recycling of the used members .