Two-in-one glass cleaner and rain repellent improves visibility and also provides better rain repellency to surfaces. Ideal for pre-cleaning glass surfaces. if you want to apply Rain-X Rain Repellent rain repellent to the windshield (code: S1830025). The product cleans the surface and provides ideal properties for the final finish. which ensures the surface is hydrophobic and water-repellent when driving in the rain.