I used 1/2 of the stuff for my 1 inch shaft. So far, I have not had to add any more. And by the way, my shaft does NOT have ANY DRIPPING. NO drip at any speed 0 to full RPM! AND, after running at high RPM for over 1/2 hour I can still reach down and hold my stuffing box with my bare hand.... no heat build up. I have also removed the shaft a couple of times for other maintenance and do not have any wear on it."