First you cannot wash your hair for 3 or 4 days with the treatment.  So to get you by for a couple days you might think of using a dry shampoo.  But you have to be careful of the ingredients.  No Sulfates, Parabens, Sodium Chloride.  So try Unite Dry Shampoo.  Make sure that you shake the can before you use it.  This shampoo doesn’t make  your hair look dull.  It will get rid of the oil from your scalp.  It will refresh and revive your hair with lift at the scalp.  It is gentle on your hair to use with the keratin treatment.  When you can wash your hair finally it would be in your best interest to use a product that has keratin in the shampoo and conditioner.  It keeps the treatment lasting alot longer than using just a regular shampoo.  You could even use the shampoo and conditioner if you didn’t get the treatment.  What it would do is calm your hair from the frizz.