cleat/fasteners/galvanic corrosion

westmatt

Rank: Mate

Registered: Sep 23, 2022

Last visit: Sep 03, 2025

Posts: 137
Posted: Aug 30, 2025 - 09:20 PM

When using monel or SS rivets or other fasteners, what options do I have to prevent ss to aluminum contact? I think I would have a hard time explaining the purchase of a 2oz. container of Tef Gel at $72 to my wife. Would something like Permatex Red or Copper do the trick? This is for a cleat on the boom.

-Matt
rattlenhum

Rank: Mate

Registered: Aug 01, 2002

Last visit: Sep 01, 2025

Posts: 432
Posted: Sep 01, 2025 - 06:12 AM

Lanocote has worked very well for me. Since getting it for the boat, I've started putting it on just about everything that's screwed together outdoors. That small tub will last you (and a friend or two) forever. It smells like hell, though!

--
Jerome Vaughan
Hobie 16
Clinton, Mississippi
--
Dogboy

Rank: Mate

Registered: Mar 19, 2004

Posts: 968
Posted: Sep 03, 2025 - 11:58 AM

I am seeing closer to $40 for a 2oz container of Tefgel on Amazon. Still pricey, but that little jar will probably last a lifetime for personal use. You will forget about the cost and be happy you used it when you go to take something apart 10 years later and there’s no pitting or corrosion. Ounce of prevention as it were…

sm

Edited by Dogboy on Sep 03, 2025 - 11:59 AM.
westmatt

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Registered: Sep 23, 2022

Last visit: Sep 03, 2025

Posts: 137
Posted: Sep 03, 2025 - 12:30 PM

Thanks for the responses - food for thought.

-Matt
JohnES

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Registered: Sep 01, 2002

Last visit: Sep 03, 2025

Posts: 801
Posted: Sep 03, 2025 - 03:31 PM

Opps, forgot to log in... ^^^^^^^

For rivets, I have used Teflon Plumber Pipe paste and Aquashield and though a little messy, they seemed to have done a good job. The plumbers putty hardens up and creates a nice seal..

For nuts and bolts, I have used Loctite Anti Size in liberal amounts... This has a high messy factor, but nothing that some Windex and paper towels can't handle.
westmatt

Rank: Mate

Registered: Sep 23, 2022

Last visit: Sep 03, 2025

Posts: 137
Posted: Sep 03, 2025 - 11:10 PM

JohnESOpps, forgot to log in... ^^^^^^^

For rivets, I have used Teflon Plumber Pipe paste and Aquashield and though a little messy, they seemed to have done a good job. The plumbers putty hardens up and creates a nice seal..

For nuts and bolts, I have used Loctite Anti Size in liberal amounts... This has a high messy factor, but nothing that some Windex and paper towels can't handle.

Thanks John.