Wörterbuch (en): impregnate / waterproof / soak
de:
imprägnieren (v)
fr:
imprégner
it:
impregnare
es:
impregnar / impermeabilizar
A process that makes materials "immune" to external influences. Building materials are soaked in or coated with substances to prevent rotting, animal infestation, water penetration or flammability.