Lisap Ultimate K Pre-Treatment Shampoo Step 1 deeply cleanses hair, removing impurities, product residue, and excess oil to prepare the hair fiber for straightening. It gently opens the cuticle and optimizes the absorption of the smoothing active ingredients. Directions for use: Apply to damp hair, massage gently, and leave on for a few minutes before rinsing. Repeat if necessary. Continue with Step 2 of the treatment.