What if We told you that coating your vehicle with protection that lasts 3 months or longer was as simple as spraying on and rinsing off with a hose? McKee's 37 hydro Blue does exactly that. This highly-advanced Sio2 coating is applied exactly as described above; waxing your car has never been this easy. McKee's 37 hydro Blue can be used as a stand-alone form of paint protection, or as a booster for your favorite paint, glass, or wheel coating. That's right: McKee's 37 hydro Blue is 100% safe for All exterior surfaces.