Duralac Anti-Corrosive Jointing Compound 115ml

This is an excellent anti corrosion coating , mainly to prevent bolt corrosion ( or rivets) between dissimilar metals . It has been used in the aircraft industry for a very long time and is the best product of its kind. Not a paint, it is smeared on the underside of bolt heads and along shanks where they contact another metal surface.Applied properly in this kind of way, it is effective for many years. I recently undid some bolts that had been in place 20+ years , there was no corrosion on those I'd treated with Duralac.The tube is not cheap but a little goes a long wayI used it on bolts and rivets that hold an airframe together.Top class product

Really, really expensive when you only need a couple of smears.