Joico K-Pak Professional Cuticle Sealer p H Neutralizer Joico K-Pak Professional Cuticle Sealer p H Neutralizer smoothes & tightens the cuticle locks in curls & colour & reduces p H swelling to restore hair back to its natural state of 4.5-5.5. Cuticle is locked down & sealed. Any sign of swelling or raised cuticle is diminished. It deactivates & removes ammonia & peroxide residues while eliminating perm odours. To use: Apply to clean, towel dried hair & leave on for up to five minutes before rinsing out.