Protectosil Coating for building surfaces From Wikipedia, the free encyclopedia Protectosil is a silane manufactured by Evonik and marketed as a protective coating for building surfaces. It is used as a water repellent, and for corrosion and graffiti control.[1] References [1]"Protectosil". Retrieved 2008-06-11. This material-related article is a stub. You can help Wikipedia by adding missing information.vte Related Articles