Voodoo's New Tire Sauce. A tire prep that has been in the works for over a year now has finally been introduced. Track Assassin provides the ultimate bite on any surface. This sauce comes in two flavors 1) Tire conditioner that is guaranteed to soften your tires at least 2 pts on a durometer, and the sauce #2 that will give ultimate traction on any surface. No need to buy different Tire prep for each track condition. Track Assassin has you covered. Track Assassin intro price is $10.00 a bottle.