PVC-Cold-Welding Liquid Type A Seam sealing of PVC-floor coverings / PVC-wall coverings with closely-cut seam (new installation with double cut). Firmly mounted steel needle with special cap (closed system). The steel needle penetrates deep into the seam area, opens it temporarily and the cold-welding liquid flows along the needle into the seam. Thus adjacent sheets will be temporarily dissolved and joined together strongly and permanently in the whole cross section of the seam. Very high seam tensile strength. Durable, waterproof seam sealing . Nearly invisible seams . Ready for use and reusable.