PVC Pipe Fitting Accessories are used to complete the PVC Fitting Cover System. PVC Fitting Covers being used on hot piping systems are closed by the use of King Tacks which are white stainless steel serrated tacks which are put through the overlap on the PVC cover to hold it in place. PVC Fitting Covers being used on cold / chilled piping systems will use PVC Permaweld Adhesive and/or PVC Vinyl Z-Tape to seal the PVC covers and seal the vapor barrier. Insulation silicone caulk can be used to seal joints and overlaps of insulation jacketing systems. We also offer reusable valve wraps for use on valves that need continual access.