... ) continuous rolls in nominal wall thicknesses of 1/4'', 3/8'', 1/2'', 3/4'', 1'', and 1-1/4'' (6, 10, 13 ... closed cell structure It is used on the exterior surfaces of the ducts and large diameter pipe lines in the heating, cooling and air ... a special adhesive that Hengbao suggested. For the pipe applications, the pipe to be insulated and the rubber surface should fit properly and ...