airtight
ballproof
bombproof
bulletproof
burglarproof
corrosionproof
dampproof
fire-resisting
fireproof
flameproof
foolproof
hermetic
holeproof
impassable
impenetrable
impermeable
impervious
impervious to
leakproof
noiseproof
nonpuncturable
proof
proof against
resistant
rustproof
shatterproof
shellproof
soundproof
tight
unpassable
unperforable
unpierceable
watertight
weatherproof