Tire tweak is the most popular tire conditioner for both R/C and slot car foam tires. Rub into tire the night before a race and let air dry. If damp the next morning, wipe off with dry rag before venturing out on the track. Tire tweak doesnt soften your tires but it restores the natural chemical grip of the tire. Increased traction without accelerating tire wear. Quicker lap times because of greater cornering speed without bogging on the straightaways. Works on fish, standard, treated, untreated, thunder, speed and wonder rubber