The .0125 is ok for the tape.
However I now use Boat Life- LifeSeal instead of that Tef-Gel.
I used to use Tef-Gel, but over the past few years have had a couple boats rigged 5-10 yrs ago, by me or a yard I worked at (meaning I know how the hardware was installed) ,now comming back from the tropics and the tef-gel didn't do the trick. As we take things apart, fasteners are comming out mostly, but not without heat and some corrosion damage to the aluminium. The Tef-Gel is still on there around the screws and bolts, plates and rivets, and it is even harder to get off, still as gooey as day one, or more so as it seems thicker now.
The places where silicon was used are comming apart easily without corrosion around them. I think the LifeSeal product is even better than straight silicon now, because it bonds well to aluminum and staineless, and plastic, for more water resistance. Also no silicon acid problem potential with the LifeSeal, which is a hybrid sealant.
Anyway, either way will be better than nothing, so as Brion says in the Riggers Apprentice, "...always coat any fastener with silicone, ...lanolin..., or other goo before putting it into any metal"
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Brian Duff
BVI Yacht Sales, Tortola
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