Tuff-Gel vs Tef-Gel

[Brion Toss]

Hello,
We use both Tuf-Gel and Tef-Gel in our shop, the former as a more-corrosion-resistant substitute for Loctite. Tuf-Gel's tenacity seems to vary more than Loctite's, but is always at least as good as blue, and sometimes more like red. As with red, application of heat will free it up, though you don't want to be standing downwind at the time, as Tuf-Gel's fumes are really, really toxic.
Anyway, we use Tef-Gel for most applications, like machine screws and isolating dissimilar metals, and Tuf-Gel on bolts, mechanical fittings, and furlers -- anyplace where vibration, torque, or anything else might cause things to come unscrewed. I have never seen, for instance, firmly-made winch or cleat fasteners back out when Tef-Gelled.
Fair leads,
Brion Toss