Thread sealant/lube

[c350ia]

I am in the process of replacing the rinky dink jam cleat for the main sheet. Going to upgrade to a Spinlock identical to the other Rope clutches. When I pulled the machine screws I noticed that there is some form of grease or sealant on the threads and it certainly did a good job. Trevi is a 2008 and there was no corrosion on the machine screw and it did
Anyone know what this substance is, it clearly does not harden or form into an adhesive.

[wolfe10]

If you are looking for something to materially reduce corrosion between two dissimilar metals TUF-GEL is excellent. Have used it for decades for stainless steel bolts into aluminum mast.

But, it has no sealing properties/will not keep water out. You may need both a small amount of polysulfide sealant as a bedding compound and the Tuf-Gel further down on the threads themselves.

[KenKrawford]

Here’s a rather long, detailed “how to” that shows the best way to bed deck hardware using butyl tape - https://marinehowto.com/bed-it-tape/

[wolfe10]

Here’s a rather long, detailed “how to” that shows the best way to bed deck hardware using butyl tape - https://marinehowto.com/bed-it-tape/

Yes, a good option and some interesting observations.

[c350ia]

Thanks all for the responses. Tug Gel was the name that I could not recall.

[D&M]

That’s Tef Gel after all the auto corrects are fixed.