Arse - messing around with the CH/HW system plumbing and I seem to have managed to make a soldered pipe joint weep (presumably the joint was bit marginal and I forced it in a way that caused it to finally fail). I'm loathe to drain down enough so I can remake the joint right now as I recently put in some X400 cleaner and was planning on leaving it a bit longer before draining down anyway.
Any suggestions for something I could put on the joint for now that would seal it until I can do a proper job on it?