Antonyms of adj gas-tight

1 sense of gas-tight

Sense 1
airtight, air-tight, gas-tight -- (not allowing air or gas to pass in or out)

INDIRECT (VIA tight) -> leaky -- (permitting the unwanted passage of fluids or gases ; "a leaky roof"; "a leaky defense system")

Similarity of adj gas-tight

1 sense of gas-tight

Sense 1
airtight, air-tight, gas-tight -- (not allowing air or gas to pass in or out)
       => tight (vs. leaky) -- (of such close construction as to be impermeable; "a tight roof"; "warm in our tight little house")