Visibly reduce surface damage in a single treatment with Redken Acidic pH Sealer. Acidic pH Sealer is Redken's Salon Exclusive Concentrated Protein Treatment for clients with damaged or over processed hair. This treatment is used after a customized treatment of Acidic Moisture Concentrate and/or Acidic Protein Amino Concentrate. This treatment features a pH of 3.0-4.0 to helps seal the cuticle, lock-in treatment benefits and add instant shine.