An ionomer-based structural interlayer used in selected laminated glass constructions where its specified stiffness, strength, clarity, edge stability, or post-breakage behavior is required.

GlassRenu · Educational illustration
Meaning and boundaries
Ionoplast is not a generic synonym for all stiff interlayers, and manufacturer values cannot be transferred to an unidentified laminate.
Why it matters in glass restoration
Structural laminates, railings, canopies, and point-supported glass may depend on the identified interlayer and engineered load-duration behavior.