Our products for sealing gaps on doors and gates In your company building, warehouse or factory, goods are most likely to be supplied and removed via one or more industrial doors or dock systems. These doors and docks are fitted with rubber seals or a weatherstrip as standard to prevent the penetration of water and air as much as possible and thus to “keep out” the climate. EM-FLEX provides solutions to the problems you have in your company due to poorly closing docks and doors.