A heat-activated leave-in split end treatment to repair & protect, ghd Rehab Split End Sealer works to protect the integrity of your hair by sealing the cuticle for instantly smoother, stronger & healthier-feeling hair¹ looking lengths. Clinically proven to seal split ends for up to 10 washes², this transformative treatment targets brittle ends for a visibly revived finish. ¹ Consumer testing, 110 women, Aug’16. ² vs. untreated hair.