Gluing class (EN 314)

Also: EN 314, gluing class 3, BFU 100, BWR

European classification of plywood adhesive bond strength and durability under EN 314-2. Classes are: 1 (dry interior), 2 (humid interior), 3 (exterior - the standard for structural and FR plywood). Class 3 corresponds to BFU 100 (former DIN 68705) and ensures bond integrity under prolonged moisture exposure.