After
Hello Karen, although our professionals will be sure to keep the undercoating solution off of your tires we would suggest getting those new tires put on after the undercoating.
Definatly After, it took me hours to remove the coating from my brand new wheels.
I would most definitely say after to be safe, but Kyle if he still works that at Ziebarg can answer that question better than i can. Ill bet you could go eother way though honestly (sorry, im not a mechanic😉). Good luck though!!!!
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