airproof

“The chalk-on-board sound of that six-foot-long zipper closing, the finality of encasing the victim in an airproof sack, feels like a gut-punch no matter how many times you've witnessed it.”

The 5th Horseman

“The gas holder is normally an airproof steel container that, by floating like a ball on the fermentation mix, cuts off air to the digester (anaerobiosis) and collects the gas generated.”

Chapter 15

“Back of these in turn are folding blinds; then long, close curtains of muslin; then, finally, thick, manifolding, shrouding draperies of some airproof woolen stuff.”

Europe Revised

“[Storage] Place in airproof, shady and dry condition.”

Wil's Ebay E-Store

“However, for electric devices, a much higher sealing performance is required to secure airproof properties to lessen the dangers inherent in such devices.”

The Earth Times Online Newspaper