Thread lock vs jointing compound on ss screws into aluminium

[wot]

Why not use Rivnuts instead, they provide the benefits of being able to use properly threaded screws/bolts into what is effectively a captive nut, without any of the drawbacks of poprivets.

[Graham_Wright]

I am in the process of adding a couple of mast steps using stainless steel screws to attach them to the mast. I had intended using Duralac jointing compound to minimise electrolytic corrosion between the different metals. Having regard to the relative thinness of the aluminium mast section I was wondering whether it might be better to use loctite 243 thread lock instead. Any thoughts?
Thanks

Try Rivnuts (or similar). Baseline recommend attaching their steps using M6 screws straight into the mast. Horrific thought.

Rivnuts seem to give the best of everything but you still need to pay attention to corrosion. You need a high mechanical advantage to close SS versions. One of my staff is like a gorilla but he couldn't pull an M8 one into ali box using a hand device. I think you can hire a powered version.

[lw395]

Rivnuts are a good call.
You can get ali ones.
I would have thought M5 strong enough?
Google the spec for the brand you have in mind, I think there are several?

[srah1953]

Which would be best pop rivets or tap and drill?

[wot]

Which would be best pop rivets or tap and drill?

Well you've got three votes above for rivnuts instead of either pop rivets or tap & drill.

Whichever option you chose I would use Duralac as a jointing compound tominimise possible corrosion,