Impossible to permeate:
Packed in an airtight container from which most of the air was exhausted before sealing, so as to maintain freshness
Having no weak points; sound:
Of a machine, supplied with oil so as to allow smooth operation.
Having no flaws or loopholes; impossible to fault, refute, or evade:
Incapable of being penetrated:
Not letting rain through; shedding rain
A waterproof or water-repellent coat for giving protection from rain
Leaving little empty space through compression; compact:
Find another word for waterproof. In this page you can discover 28 synonyms, antonyms, idiomatic expressions, and related words for waterproof, like: impermeable, vacuum-packed, , insulated, airtight, oiled, watertight, impervious, hermetically-sealed, sealed and rainproof.