"Waterproof" is a word in ENGLISH

A substance or preparation for rendering cloth,
leather, etc., impervious to water.

To render impervious to water, as cloth, leather,
etc.

Cloth made waterproof, or any article made of such
cloth, or of other waterproof material, as rubber; esp., an outer
garment made of such material.

Proof against penetration or permeation by water;
impervious to water; as, a waterproof garment; a waterproof roof.