Question 1

Does a rain-repellent coating work at low speed too?

Accepted Answer

Yes, but the effect is strongest above 60 km/h. At low speed water still beads and slides off in large drops, but there is not enough wind to blow it clear. Your wipers still have to work, but they move much less water each sweep.

Question 2

Does the coating damage my windscreen wipers?

Accepted Answer

No, a good coating does not damage the wipers. The reverse can be true though: worn wiper blades can damage the coating. Make sure the blades are in good condition before you apply the coating so they glide smoothly over the surface.

Question 3

Can I apply a rain-repellent coating over an existing coating?

Accepted Answer

It depends on the products. Many consumer coatings are compatible and can be layered after degreasing. With professional nanocoatings it is recommended to remove the old layer first with glass polish for optimal adhesion.

Question 4

How do I know when the coating has worn off?

Accepted Answer

The simplest test: sprinkle water on the screen when it is dry. Does it form tight beads that slide straight off? The coating is still working. Does the water spread into a thin flat sheet? Time for a new application.

Question 5

Does rain-repellent coating work on the rear screen and mirrors too?

Accepted Answer

Yes, and it is especially worthwhile on door mirrors. Mirrors are hard to keep clean and water on a mirror immediately blurs your side vision. A thin coat keeps them noticeably clearer for longer.

Rain Repellent

Shiny Garage Drop Off Hydrophobic Glass Coating 150ml

Frequently asked questions