Follow directions. I use about a 1/2 inch of each tube...mix well, wipe the handle with a tissue or you will stain your hands. The gel consistency let's you apply exactly where you want it. Timing is a test I use about 3 1/2 minutes...I have a black wash cloth that I use to clean off the product.,.(I use the black color product). That way my wife doesn't kill me for getting black dye on her white wash cloths...been doing this for several years and I'm still alive. The color lasts about two weeks then I reapply. Great product. If someone asks if I color my mustache I say "yes"...and I recommend the product.