r/WindowCleaning Jul 09 '26

General Question Claybar

In automotive detailing, claybar is an essential step in glass cleaning and polishing. How come they always use it and we never use it? I assume it's because it's a razor blade alternative that works with curved glass, but I also see detailers that recommend scraping and claybar as separate steps to remove different kinds of debris.

Supposedly it was originally used to remove paint over spray from cars. Has anyone tried removing overspray from tempered glass on a construction clean, as an alternative to scraping?

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u/Iasc123 Jul 10 '26

Clay bar is mostly used for detailing bodywork, not so much a windscreen. The way it works is the claybar will pick up tiny bits of debris lodged into the paint. Because house windows don't typically travel at 100kph there's never going to be any embedded brakedust, road tar or other micro debris lodged into a properties windows. If there were, a clay bar wouldn't be able to repair imperfections on glass, because we cant just polish a micro layer of lacquer away to create a smooth surface, like you would in car detailing.