ISO Tef-gel substitute

[The Gruendels]

I need to install some clutches this weekend using ss machine screws and aluminum backing plates.  I had ordered some Tef-gel online, but it hasn’t arrived.  Checked with the retailer, and the order got filled several days later than I expected it would.  So, is there an adequate, readily available substitute to provide corrosion resistance between dissimilar metals (aluminum and ss)?

 

Dave

P27 “Callisto”

[RICHARD USEN]

Lanocoat from West Marine is what I use.

 

Dick Usen

T-33 #100

Hopscotch

Boston

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[Michael Robinson]

Anhydrous lanolin.  Your local drugstore may have it.  Way,  way cheaper than Tef-Gel and basically the same stuff.

Cheers,  Mike Robinson.

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[Guy Johnson]

Anti-seize by loctite. Or blue loctite.

Guy

Sent from my iPad

[Jeff Griglack]

Anti seize and blue loctite both should be available from Home Depot, Lowe's,  Walmart, or a local auto parts store.

[Peter Ogilvie]

You can use LocTite, believe blue is the least tenacious though I've never had a problem getting the red undome.  LocTite seals the threads so no water can get in.  Are you tapping and threading the aluminum to hold the fasteners or is it just a backing plate with SS nuts and washers.  If it's the latter, you really don't need anything on the thread except a little lubricate so the threads don't gall unless you are trying to keep them from coming undone and then LocTite is what you should use.

From experience, buy some aluminum primer (Zinc Chromate) and spray the aluminum both sides.  With nothing to protect the aluminum, it will soon get that ugly chalky white corrosion and may even pit.  The zinc chromate comes in ugly yellow and ugly green so if it's going to be visible in the cabin overhead, a top coat of paint will make them look way better.  Painted all the backing plates in the cabin overhead and it made the interior look way better. 

 

Aloha
Peter Ogilvie
'Ae'a, Pearson 35 #108

[The Gruendels]

Many thanks for all the good advice.  Tried a few pharmacies for the anhydrous lanolin, but none had any on hand.  Think I’ll go with the blue Loctite since I’ve got some in the shop already.  Since I’m strictly fresh water, and since I’ve had no trouble so far (13 seasons) with other aluminum on board, I’ll pass on the zinc chromate for now.  Thanks for the warning, tho.  I can check annually on haul out for any degradation.  I’m familiar with that primer from painting a few aluminum storm doors in the past. 

 

Even tho it’s been cold and rainy here lately, it’s been nice to get the boat out and start working on her again.  When spring comes, it’s usually with a rush.  Best be ready.

 

Dave

P27 “Callisto”