Quote Originally Posted by kulaog View Post
Considering the benefits in using the product, the wiper judder/skips are some things i can live with. Ang laking tulong kasi kapag umuulan or bumabagyo coz i can see better. Main concern ko lang is, di kaya nakakasira sa windshield in the long run? Been using it for more than 4 years.

Edit: Mas ayaw ko nga yung walang repellant na parang nagmemelt yung water on the windshields pag malakas ang ulan. Hindi mo makita yung daan. A friend of mine said, try ko rin daw 3M wax on the windshield. Same effect rin daw but never tried that one yet.
I don't think constant application of the rain repellent (e.g. RainX or Glaco) will eventually damage your windshield. Just like wax or sealant, coating lang yan. Wala siyang abrasives or solvents (afaik). The worst that could happen is that you'll probably get uneven buildup of the stuff if you keep applying new coats without removing the old coat.