Prime for Perfection should never be mixed with other products. It is intended to be used on its own.
Each tube contains a single application for shoulder length hair. The consistency of this product is a thin gel so it enables full saturation of all of your hair strands and provides even results.
Prime for Perfection should be applied first according to the application instructions, followed by Radiant Cream Color or Color Reviving Gloss.
We recommend always following up with a Radiant Cream Color for best results. However it is not necessary to use any product after using Prime for Perfection if you like your color results after its use. Just be aware that the result will usually be warm in tone. If you prefer a cool tone in your color you will need to follow up with another ash or violet based permanent or semi permanent color.
You can find more information about Prime for Perfection here.