I'd like to, but I'm hearing many conflicting reports from seasoned members about leaks w/ phenolics. I'm installing NW's mani.'s (finally getting around to it) and just don't want leaks. But if I can do the phenolics w/ the cork/rubber gaskets and not leak that's what I'd prefer of course. And it seems there are many different opinions on dressings to use for this procedure. I'd love to hear the best one.