Corrubit Corrugated Bituminous SheetsPlaces of Use For waterproofing purposes on roofs with a minimum slope of 9%, On any steel, wooden or reinforced concrete construction. Product OptionsBTM 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