impermeable, tight, airtight, vacuum-packed, oiled, rubber-coated, watertight, insulated, impervious, hermetically sealed.
"waterproof." YourDictionary, n.d. Web. 27 February 2019. <https://thesaurus.yourdictionary.com/waterproof>.
waterproof. (n.d.). Retrieved February 27th, 2019, from https://thesaurus.yourdictionary.com/waterproof
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