Features: Our state-of-the-art technology maintains a strong coating which resists friction by wipers, dust, car-wash or cleansers, and lasts 6 times longer than conventional coating agents. The water repellency lasts up to 1 year. How To Use: * Remove dust or dirt from the windshield with water in advance. 1. Shake the bottle well with the cap on. 2. Take the cap off and apply it evenly on dry windshield. *Do not apply it on wet windshield otherwise it may cause damage to the surface. 3. After drying for 5-10 minutes, wipe it off with a dry, clean towel, afterward dry for more than 12 hours, in order to make the coating adhere firmly to the windshield.