McKee's 37 Tire & Rubber Rejuvenator Concentrate 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 your favorite tire shine. McKee's 37 Tire & Rubber Rejuvenator Concentrate deep cleans tires better than any other tire cleaner or all purpose cleaner available, and it will not cause your tires to turn brown. This concentrated formula dilutes 1 part concentrate with 3 parts water, making it an unbelievable value!