McKee's 37 tire & rubber rejuvenator is a heavy-duty cleaner and degreaser that safely removes unwanted browning, silicone-based tire dressings, dirt, and grime from your vehicle's tires, leaving them squeaky clean and ready for application of McKee's 37 tire coating. McKee's 37 tire & rubber rejuvenator deep cleans tires better than any other tire cleaner or All purpose cleaner available, and it will not cause your tires to turn brown.