İ Z M E R Corrubit Corrugated Bituminous Sheets İ Z M E R Places of Use For waterproofing purposes on roofs with a minimum slope of 9%, On any steel, wooden or reinforced concrete construction. İ Z M E R Product Options BTM Corrubit A 2000*930 Red EX/200P BTM Corrubit A 2000*930 Green EX/200P BTM Corrubit 1000*450 Ridge Red / Green BTM Corrubit Monoblock Oval Nail Red / Green