You know I thought about it and figured I would add that when I say a little sealer I mean a very little. If you look at the back side of the rubber boot there is a built in O-ring. I take a little case sealer on a peice of card board, then I dab my finger in it lightly and then dab it on the O-ring portion of the rubber boot lightly. You do not need to put a great big bead of rtv on it.