That will not allow water to penetrate

present participle of moisturize

(advertising slang) The act of making something moist; but especially, of a cosmetic, of making the skin or hair less dry

(advertising slang) That which appears to moisturize; that which humidifies.

In a moist manner.

simple past tense and past participle of moisturize

Third-person singular simple present indicative form of moisturize

plural of moistener

Something used to moisten, especially a cosmetic.

simple past tense and past participle of moisturise