A thin-film coating deposited onto glass in a vacuum, commonly by magnetron sputtering after the glass ribbon has formed.
GlassRenu · Educational illustration
Meaning and boundaries
Often called a soft coat, but products vary and the nickname should not replace the manufacturing-process term.
Why it matters in glass restoration
Many MSVD coatings are protected within a glazing assembly; an exposed or unidentified coating is a stop-and-verify condition before abrasion or polishing.