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“Exterior” “Interior” plywood
Exterior (WBP) plywood is suitable for use in external conditions. The glue used in this type of plywood (phenol-formaldehyde resin) is water-resistant.
NB! Waterproof glue ensures that the veneer layers do not separate under the influence of water, but the outer surface of the board itself is not waterproof, so the board should be covered with a paint, varnish or stain that ensures water resistance and is suitable for outdoor conditions.
Interior (MR) plywood is suitable for use in dry indoor conditions. The binder is urea-formaldehyde resin
How to visually distinguish exterior and interior plywood?
