I have a very slow dripping leak along the boiler return line (threaded black pipe), a few joints away from the actual boiler. I would rather not repair now as it's too cold to lose heat for a day: drain the system (and finally install shut offs on either side of the boiler!), cut the pipe, install a new union, refill, purge air, etc. It looks like the pipe dope on this specific threaded connection may have been insufficient.
Is there anything that I can apply to the outside of the joint (epoxy, etc?) that would stop the dripping until I can deal with this next Spring/Summer?
Thanks.
-Theodore