sealed against the elements(waterproof) とはどういう意味ですか?

質問を翻訳

@dondondonguri It means the subject is sealed/protected against rain, snow, winds, etc. For example, a building's walls and roof need to be sealed against the elements by having waterproofing and airtight materials. They prevent air, moisture and water from outside to enter the building. So they seal the building against the elements.