Building products and materials, namely flashing and junctions; seal devices, including rolls and watertight or hermetic covers for sealing roof penetrations; roof flashing, not of metal; rubber flashings for roofs; rubber flashings for buildings; non-metallic flashing for windows, frames and holders; non-metallic flashings for waterproofing buildings; seal devices for use in sealing about a member extending through an aperture in another member; parts and fittings for all the aforesaid goods