An elongated sealing assembly arranged to extend across a rectilinear rough opening in a wall of the building and a window frame for supporting a glass infill in that window frame, the elongated sealing assembly comprising an elongated extruded flexible panel having an elongated first edge, an elongated second edge, an elongated first side, an elongated second side, an elongated bituminous strip extending adjacent a second edge on the first side of the flexible panel, an elongated bituminous strip extending along a first edge on the first side of the flexible panel, an elongated dart flange extending perpendicularly outwardly from the first side of the flexible panel adjacent the elongated bituminous strip thereat, and an elongated, thickness-adjustable assembly coextruded with the elongated extruded flexible panel to permit in-field accommodation with adjacent yet spaced apart gaskets with respect to the support of a glass infill in the window frame.

A waterproof sheet comprising a rubber base and a pressure-sensitive adhesive layer of silicone resin or gel thereon is applicable to the boundary between an outdoor tank and a concrete pedestal. The waterproof sheet maintains waterproofness over a long period of time and is in long-term service without degradation of physical properties.