Material left on glass after tape, labels, films, mastics, glues, or other adhesive products are removed or age in place.
GlassRenu · Educational illustration
Meaning and boundaries
Adhesive residue may include backing, plasticizer, dirt, and weathered polymer. A sticky mark does not identify the adhesive chemistry.
Why it matters in glass restoration
Removal methods that are safe for uncoated glass may damage coatings, decorative surfaces, interlayers, gaskets, or sealants.