Mustard Dave
Well-Known Member
Do not use sealant!! Use PTFE tape instead. Wrap it around the thread the same way as the nut tightens
sent by carrier pigeon
The only place PTFE tape should be used is on the rad tails where they screw into the radiator itself. They should not be used on the threads on the union (where the nut screws on). All that nut does is secure the face of the union or olive. No tape or sealant should be used on unions or compression fittings.