PURPOSE: To obtain the title material having excellent waterproofness and sealability, simplifying and quickening bonding operation, consisting of a sheetlike main body comprising a polyolefin-based resin and a primer layer of a copolymer of an olefin and methyl methacrylate.

CONSTITUTION: A primer layer 3 comprising a copolymer of an olefin and methyl methacrylate, a copolymer of an olefin and ethyl methacrylate or a terpolymer of an olefin, methyl methacrylate am ethyl methacrylate is formed on the surface at an adhesive side of a sheetlike main body 2 composed of a polyolefin-based resin to give the objective material 1 for floor, wall and ceiling. For example, an acrylic adhesive 5 is applied to the surface of concrete 4, the primer layer 3 is laid down and the material is placed.