I believe I know what you mean, but we don't say it that way in the US. We'd need to add some words. The expressions "vacuum-packed" and "vacuum-sealed" have been around for a long time.
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Nor PriestIt was mistaken.Nevertheless, if there were an expression, "To be made vacuum," it would be an adverb."
AvangiNevertheless, if there were an expression, "To be made vacuum," it would be an adverb."
CalifJimNone of the others are adverbs.You're probably right.