One pound Glass Compound is enough to recondition several windshields. Use with Glass Polishing Wheel (40011 A). First mark the damaged area, mix the Glass Polishing Compound with water, attach the Glass Polishing Buff to your drill or low-speed polisher (1500 rpm), dab on the Compound and keep the wheel moving and wet. The Pro Kit (40011) includes: Special Glass Polishing Wheel (2 1/2in. diameter x 1in. thick), 1/4in. adapter (for use with your electric drill), One pound of Glass Polishing Compound, and instructions. The Auto Glass Sealant (34017 ZC) helps stops water leaks.