Was going to replay to your other post on the landy forum, but will here instead.
loctite hydraulic thread sealer can't remember the number of the top of my head.
Wynns power steering leak stop
Normal loctite 243, 270 etc in the tiny sample bottles.
Which reminds me. If you have a chat with Loctite, they may oblige to some samples... Especially if you tell them that your trip is long etc, etc.. You may have to offer to provide a home to a bumper sticker! They are very helpful and have some interesting products available.