LINK-D Bond Sealer No. 4 Rebuild, Protect, Restore Hair 100ml

Bond Sealer No. 4 is a serum for the hair for professional and home use. It creates a protective barrier on the hair’s cuticles, which is capable of maintaining moisture and prolonging the repairing effect on the disulphide bridges created by the previous Link-D steps. Giving hair gloss and protecting its shine by acting as a UV filter.