Are you autocross racers having a hard time keeping yours tires sticky? Well I've tried all kinds of tire treatment's with some success but most are high $$. Try "No Touch Tire Care" at NAPA, Autozone, etc,etc. Just clean up the tread, then scuff up the surface, and spray the tires tread area. Seam's to work as good as the high $$ stuff with much less cost. None of the tire treatment's will make the tires sticky as new, but it will help. With the high $$ stuff, you would coat the tread over and over till it remains shiny. About 3 or 4 coats. If your car is an autocross car only, get the tires off the ground between races.