Based on DiBt PG FBB Section 5.2, Wolf® “SQ” sealing products contain a Super Absorber Powder (SAP) which forms a polymer gel on contact with rain and tap water. The polymer gel is an excellent barrier against water and gases. Sealing strips type SQB-V* contain a swelling non-woven based on a super absorber polymer powder which is bound directly to the nonwoven. The longitudinal edges are sewn with a 3-thread safety stitch and prevent the polymer gel from escaping uncontrolled. If the unsewn small sides are not pressed during use, a small amount of polymer gel can escape from the sealing tape. When the water bound in the polymer gel evaporates, it becomes coarsely powdery again. The swelling ability is reversible (reusable product).