Schwarzkopf Fibreplex No 2 Bond Sealer is a professional-grade treatment designed to work in tandem with the Fibreplex system to further reinforce the hair structure after coloring or lightening services. This step-two product helps to seal the hair fiber, reducing breakage and improving tensile strength. Regular use, as part of your at-home maintenance routine, ensures lasting protection against damage caused by chemical processes, leaving hair feeling noticeably stronger and healthier.