Prepare hair using Penetraitt shampoo.
Do not use conditioner at this stage.
Towel-dry to 75% then comb through.
Part hair into four sections.
Apply Sebastian Professional Cellophanes, avoiding the scalp.
Wrap hair in cap and place under heat for 15-20 mins.
Allow hair to cool for 5 minutes before rinsing well with lukewarm water.
Follow with your preferred Sebastian shampoo and conditioner.