Which breeds of mastiffs don't drool?

Most dogs will drools when tempted with something yummy like a bit of food. A bullmastiff loves food and will drool when baited with food. The tighter the jowls are, the less it might drool. The longer the jowls, the more he or she might drool. But over all they don't drool unless they are being tempted by food or getting ready to eat.