The answer to this is no. The bottom o-ringl sits inside the screw "circle" and when it is working properly you should not need to use a sealant on the threads. What happens more often than not, is the o-ring is compressed. When you remove the bottom, you upset this o-ring and due to its compression and age it can no longer provide a seal. Replacing the o-ring with a new one should solve your problem. Hope this helps.
George Des
