| It depends on the qaulity and customer service of the touchless car wash. MOSY touchless car washes use a strong car wash solution to get all the dirty cars clean so that makes customers happy. On the other hand some car washes want to cut costs by diluting the car wash and makes more money for them and having a clean but not sparkling car.
I don't have much experience with these touchless car washes except for running through them about 10 times in beater cars.
I'm sure someone else could put in some facts and more scientific answers to your question.
EDIT: Duh! forgot to answer your question, I am guessing MOSY car washes that touchless places use will strip the wax on your car but probably won't compromise or not really affect a quality sealant that much.
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I have been had it, lol...
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