greenteQ PE-round cords are made of closed-cell polyethylene foam. They are dimensionally stable, rot-resistant and free from fluorocarbons, CFCs, HFCs and HCFCs. greenteQ PE-round cord is a backfill material suitable for backfilling of joints in interior and exterior areas in accordance with DIN 18540. No water is absorbed through its closed-cell surface. The round cords are suitable for sealing of draught and heat loss and are compatible with customary sealants. When used as backfill material, 3-flank adhesion is not required.