Joint Backing Round Cord

For specialist development of joints as per DIN 18 540-F and BFS Leaflet 23. For pre-filling profound joints and to prevent bonding on three sides. Closed-cell polyethylene. 10, 20, and 30 mm in diameter, 2 m long. room weight approximately 33?35 kg/m³. Water-repellent as per DIN 18540. Reaction to fire corresponds to building materials category B2 as per DIN 4102.