Our Car Windshield Water-Proof Spray Contains Polymer and Water Absorbent. It Can Form Hydrophilic Hyaloid Membrane Pre-Drainage Drops on the Glass Surface, and Has Durable and Waterproof Function. Its Usage Is Simple: Clean the Surface and Wait for It to Dry. Keep the Surface Dry. Shake Well, Spray a Small Amount on the Surface, and Then Apply the Coating Gently. After 3-5 Minutes, Wipe the Coating with Dry Towel until the Surface Is Clear. and Can Increase the Water Surface of Glass, Waterproof and Not Easy to Attach Raindrops.