A glazing material or complete system designed and tested for resistance to one or more defined threats such as forced entry, ballistic impact, containment, blast, or physical attack.

GlassRenu · Educational illustration
Meaning and boundaries
Security is threat- and test-specific; no single label or material proves resistance to every attack, duration, tool, projectile, frame, or installation condition.
Why it matters in glass restoration
Surface removal or changes to film, laminate, anchorage, sealant, frame, edge, or identification may affect a tested system and should be referred.