Fill applicator bottle with 4 oz. of water (tepid, room temperature). Then slowly add crystals. Shake to dissolve, forming a gel. Shampoo hair and rinse. Apply professional processing cap and expose to heat to 15 - 45 minutes.
This is a great product. There is no foul smell as with other brands I have previously tried. Wish I had purchased this before the others.
It’s a very good product