Laminated Glass Types: PVB, EVA and Ionoplast Interlayers
Laminated glass is made from layers bonded with an interlayer that helps fragments remain together after breakage. The interlayer choice matters, but no single label tells you whether the installed window resists burglary.
What matters in practice
PVB is widely used for safety glazing and acoustic applications, while EVA appears in various specialist laminated products. Stiffer ionoplast interlayers can offer structural advantages in appropriately engineered assemblies. Performance also depends on glass thickness, number of layers, edge support and the entire framing system.
Limits, risks and better decisions
Ask suppliers for test results relevant to the intended application, including impact resistance, post-breakage retention and any required security class. Avoid treating generic automotive or decorative film as equivalent to a certified security glazing assembly. A retrofit may demand frame upgrades rather than merely swapping panes.
Interlayer selection and the complete window
| Interlayer | Common consideration |
|---|---|
| PVB | Widely used in laminated safety glazing |
| EVA | Used in certain decorative and specialist laminates |
| Ionoplast | May provide higher stiffness in engineered applications |
These materials are not interchangeable security ratings. Overall performance depends on the panel construction, glass thickness, supporting frame and relevant test method. Ask a supplier for a certified assembly suitable for your particular risk rather than choosing an interlayer name on its own.
Further reading
For the related details, read our tempered versus laminated glass. Choose solutions for the actual circumstances rather than relying on broad advertising claims.
