Chemical compositions for repairing leaks; pipe muffs, not of metal; pipe muffs, not of metal; sealant compounds for joints; adhesive bands, other than stationery and not for medical or household purposes; self-adhesive tapes, other than stationery and not for medical or household purposes; duct tapes; junctions, not of metal, for pipes; fittings, not of metal, for rigid pipes; plastic sheet materials for use in manufacture; non-conducting materials for retaining heat; insulating materials; i...