Thick-walled plastic - True Diameter Casing for a secure conjunction with bitumen coating
for concreting, with one-sided trowel flange (roughened or tissue coated) for a secure conjunction with bitumen coating.
ID=Internal Diameter Casing True Diameter
» With water pressure-, gas and odour tight, surrounding KRASO 4 Seal.
» As a recess for a later installation of pipes or cables, using KRASO Sealing Insert.