A post-applied film and, where specified, attachment system intended to improve fragment retention or tested resistance of an existing glazing assembly for defined hazards.
GlassRenu · Educational illustration
Meaning and boundaries
Film alone is not automatically safety glazing, bullet-resistant, forced-entry-resistant, hurricane-approved, or equivalent to laminated glass; claims require matching assembly tests.
Why it matters in glass restoration
Restoration can cut, abrade, detach, or alter a component whose performance depends on glass, film, adhesive, edge anchorage, frame, installation, and test method.