Gents, I've had a small weep in my cooling system, which believe came from the WP inlet nipple. It's tucked away in a pretty inaccessible place, and after pulling the coupling apart, I felt a little roughness on one side of the nipple. Getting a remote camera on it, it appears to be crystalized Dex Cool. I've sanded the junk off using 320 grit sandpaper, and it feels smooth now, with only very tiny remnant. Between the difficulty of getting at this thing, and a desire not to remove too much material on the nipple, I think I'd like to stop now. What's the feeling on using anaerobic flange sealant or some such material to "reinforce" the junction between the nipple and a silicon hose?