You will have warranty only if you do legal tint. I know that there are brand name tints, but as long as you don't use any substance with ammonia in it then you will be fine. My tint job was 50 bucks and its been on it for 4 years now w/o a problem. You just gotta know how to take care of it and you will be good. I don't think i spelled ammonia right but hopefully you get the idea.