DIN 16726:1986 Plastic roofing felt and waterproofing sheet; testing
DVS 2225-1-1991 "Joining of lining membranes - Made from polymeric materials (geomembranes) in geotechnical and hydraulic application - Welding, bonding by adhesives, vulcanising"
DVS 2225-2-1992 Joining of lining membranes - Made of polymer materials in geotechnical and hydraulic engineering - Site testing