One more thing I wanted to say. Brick sealers are based on silanes, siloxanes, and organic water repellants. These go through a “curing” process. The molecules or polymers “crosslink” to one another and the substrate if it is chemically reactive. Glass is. It has what are called free oxygen atoms at the surface. These are the atoms that the polymers in the sealant/product will react with. So as Kyle said he was able to remove 99% of the sealant. Probably nothing would show in the direct sun. But on an overcast foggy day if you were to breath on a clean glass surface that had been restored, the fog from your breath would show up the drips from the sealant. The only way to completely clear these sealants once they have bonded to the glass is to remove a very thin layer of glass also. So the window must be polished with a cerium oxide, optical silica, or another superabrasive. Diamond compound and paper towels will do the same thing. In short this IS glass restoration. Would anyone that sells restoration systems like to comment on this?
Henry
