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As I was taking pieces off my boat for painting I noticed that Marinette used some kind white caulk as a thread sealer. What is it? Could it be 3M 4200. I want to use a good thread sealer/anti-seize compound when I put things back together. Has anyone ever used Teff Gel. I can't find any independant review confirming the claim that it stops galvanic activity in the threads. I don't want to use it on 100's of fasteners if it is all BS. Loctite has a big product line but I can't tell if any of their stuff is aimed and steel/aluminum connections.
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yooper wrote: Loctite has a big product line but I can't tell if any of their stuff is aimed and steel/aluminum connections. Call them, Yoop. I did once and quickly was told the appropriate product (but if I recall --it was years ago the local stores didn't carry it and I did not follow thru) Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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Rank: Upper Crust Bronze Star
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Yooper,
I used Tef gel on my rail stanchion screws. Time will tell if it works. I know Pluckebaum (original designers of the Marinette) Boats use it on new construction. I bought mine from Sailors Solution - $20 for 1 ounce.
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Rank: Marinette Royal Aluminum Poster (300+) posts
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I ordered some tef gel from Jamestowndistributers.com. They also carry 316 stainless steel screws I have been looking for. I need to get some adhesive backed 1/16 inch neoprene for the rail footings. Only place I found some so far was Graingers.
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Yooper, I am also removing hardware to get ready for paint job. All of the screws are coming out with no trouble with the original caulk on them, except two of them had a drive tip broke off in them. I first tried to drill the centers and use a screw extractor. The hardened bit just smoked my drill bits. I ended up using a small chisel to rotate the screw enough to get a vice grip on them.  "The is no dumb-ass vaccine" - Jimmy Buffet
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Rank: Upper Crust Bronze Star
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Yooper,
You might want to consider something other than black neorprene. Black rubber usually contains active carbon, which participates in the electrolysis process - it is an electron donor for the reaction. I put delrin under my rail feet to isolate them from the boat. This cannot be bought with adhesive on it, so I used Life Caulk silicone sealant - it does not contain acetic acid, like most silicone caulks - the acetic acid creates a corrosive enviroment.
Bpboater
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Rank: Marinette Royal Aluminum Poster (300+) posts
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Some of the original screws were really galled. My system in screw removal is to loosen the screw by hand before using a driver to back it out. If it sticks I can go to the Sears chisel head screw removers while the head is still intact. I am getting the boat ready for painting. I try to keep things dry and oil free and minimize the use of stuff like PB blaster. I don't like taking so much stuff off the boat. The flybridge, cowls and cockpit deck are off. Today I discover I have to remove the cabin doors. Bpboater, I will look into delrin since I haven't ordered anything yet. Adhesives are another area I am looking into. I found some interesting stuff on the Pratical Sailor site. http://www.practical-sai...terproof-adhesives.html Check the "Also with this article PDF's".
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Tef Gel is the thing to use for screws. Never had one stick using that stuff. A one oz tube goes a long way. www.smallparts.com has 1/8" thick delrin sheets available. HTH John
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Rank: Marinette Royal Aluminum Poster (300+) posts
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jhall767 wrote:www.smallparts.com has 1/8" thick delrin sheets available. Thanks for the info. I just ordered a sheet. Surface Interval 1975 28' Express, Single M360 Specs: http://www.boatm8.com/my...amp;page=boats&arr=0
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Rank: Marinette Royal Aluminum Poster (300+) posts
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yooper wrote:As I was taking pieces off my boat for painting I noticed that Marinette used some kind white caulk as a thread sealer. What is it? Could it be 3M 4200. I want to use a good thread sealer/anti-seize compound... Why not use 3M's 4200? It is a one-part general purpose polyurethane that chemically reacts with moisture to deliver flexible bonds with good adhesion. Surface Interval 1975 28' Express, Single M360 Specs: http://www.boatm8.com/my...amp;page=boats&arr=0
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Rank: Dedicated Tin Star
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Dennis Tef Gel is not an adhesive. It is an anti-seize/anti-corrosion compound. 4200 or any other adhesive might help by keeping moisture out but Tef gel keeps stainless from reacting chemically with the aluminum. It's not an adhesive. It doesn't glue them in place. Screws come out years later just as easy as they went in. No white powdery stuff.
It sounds pricey at $20 but even at that price sailboaters use it all the time. They have to deal with aluminum masts and stainless fittings.
John
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