3M 5200 to aluminum? - www.ifish.net

Go Back   www.ifish.net > Ifish Fishing and Hunting > Boat and Motor Tech

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-27-2020, 04:55 PM   #1
garyk
King Salmon
 
Join Date: Jul 2000
Location: On the BIG River, Columbia Co.
Posts: 16,281
Question 3M 5200 to aluminum?

I'm looking to repair a thru-hull hole...maybe 3/4" in diameter and plan to use some thin gauge flashing steel (it's what I have on hand) as a patch on both the exterior and interior sides of the hole.

If I clean and the scuff the aluminum, does 3M 5200 provide good adhesion to aluminum? The packaging speaks to other materials but doesn't specifically mention aluminum.

__________________
Welcome, to the days you've made.
IFisher 234

"Truth Matters"
garyk is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-27-2020, 06:31 PM   #2
fop
Ifish Nate
 
fop's Avatar
 
Join Date: Sep 2001
Location: WA.
Posts: 2,773
Default Re: 3M 5200 to aluminum?

Should work but I wouldn't use steel.


fop
fop is offline   Reply With Quote
Old 07-27-2020, 06:31 PM   #3
Brokeass Boater
Chromer
 
Brokeass Boater's Avatar
 
Join Date: Feb 2017
Location: Brentwood, Norcal
Posts: 674
Default Re: 3M 5200 to aluminum?

It sticks to aluminum fine, is the hole above the water line? If not, I think I'd have it welded,,,gregg
You can get small pieces of Aluminum at a hardware store

Last edited by Brokeass Boater; 07-27-2020 at 06:33 PM.
Brokeass Boater is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-27-2020, 06:54 PM   #4
Reel fortunate
Ifish Nate
 
Reel fortunate's Avatar
 
Join Date: Sep 2009
Location: Silverton Hills
Posts: 2,561
Default

I had a smallish hole simular to what you described. We put a cut out of diamond plate (round) and put the 5200 and screwed it with some small stainless screws. Worked great and now looks like an auxiliary hole.
__________________
Randy,
23x84 HT, Raider Coastal "REEL 1"
Reel fortunate is online now   Reply With Quote
Old 07-27-2020, 08:29 PM   #5
garyk
King Salmon
 
Join Date: Jul 2000
Location: On the BIG River, Columbia Co.
Posts: 16,281
Default Re: 3M 5200 to aluminum?

QUOTE=fop;16426487]Should work but I wouldn't use steel.

fop[/QUOTE]


so only use aluminum?
I've also got some thin gauge stainless and copper but they didn't seem right.
__________________
Welcome, to the days you've made.
IFisher 234

"Truth Matters"
garyk is online now   Reply With Quote
Old 07-27-2020, 08:41 PM   #6
Quiet Riot
King Salmon
 
Join Date: Feb 2005
Location: Columbia County
Posts: 6,157
Default Re: 3M 5200 to aluminum?

I've got plenty of aluminum scraps if you want to grab some. Or if it's readily accessible and you/me can find a time I can weld in a patch.

Sent from my moto g(7) power using Tapatalk
Quiet Riot is offline   Reply With Quote
Old 07-27-2020, 09:05 PM   #7
Oregonelkkiller
Steelhead
 
Join Date: Apr 2008
Location: Oregon
Posts: 202
Default

I had to fix some holes in my aluminum boat after a hasty fix at the lake one weekend. I wanted to use the 5200 as an adhesive to bond a block of uhmw to my boat hull to prevent putting holes in the hull below the water line for my transducer. The 5200 didn't set up at all and at camp I had to run a few screws through to hold the uhmw for my transducer. I used the 5200 to seal up over the screws but this time I kneaded the adhesive in the tube prior to using it. This time it did set up but took longer then the 24 hour the package claimed. It got me by for the weekend but I was not happy with it.

When I got home I cleaned it all off and used a new stainless steel brush to clean the aluminum up really good both inside and out. Then using a mapp gas torch I heated up the aluminum (carefully, very carefully) in circular passes and filler the holes with the alumiweld sticks. I over filled the holes then used a file to clean it up flat. The location where the holes had been looked good as new and I remounted the uhmw with thru hull screws with the 5200 as a sealant between the uhmw and the aluminum. I then covered the screw heads inside with the 5200 to ensure no leaks.

What I learned:
1) The 5200 is good stuff but it's not a miracle cure or a quick holding adhesive. If you want it for bonding strength you need to fasten the peices together like when you use a pin nailer to hold trim on so the glue can set up.
2) Knead the tube so the 5200 is mixed well and not separated.
3) The alumiweld sticks work surprisingly well. There is a little bit of a learning curve but for a patch they did well for me.
4) Work the alumiweld stick in a circular motion around the hole working your way into the center.
5) Don't use dissimilar metals especially around saltwater. If you do have to use dissimilar metals, use aluminum to stainless steel or stainless steel to steel, and use some kind of plastic or rubber as a "bushing" in between if possible.
6) Don't use acetone to pre-clean the aluminum before putting on the 5200. I used denatured alcohol.
7) Acetone works GREAT for cleaning up and removing the 5200 adhesive.

Bonus side note:
If you need to patch a large area(like your 3/4" hole) get a plate of copper about 3/16"-1/4" thick and use it as a backing material to lay your puddle of aluminum in. The aluminum wont stick to the copper and you wont blow out the aluminum from working it to much trying to fill the hole.
Oregonelkkiller is offline   Reply With Quote
Old 07-28-2020, 06:50 AM   #8
Brokeass Boater
Chromer
 
Brokeass Boater's Avatar
 
Join Date: Feb 2017
Location: Brentwood, Norcal
Posts: 674
Default Re: 3M 5200 to aluminum?

5200 will take a couple weeks for full cure. There is a fast set, but still will take a week for full cure, I use this one mostly. It's not made for a quick patch, it's a sealant with a high bond formula,,,gregg
Brokeass Boater is offline   Reply With Quote
Old 07-28-2020, 11:16 AM   #9
garyk
King Salmon
 
Join Date: Jul 2000
Location: On the BIG River, Columbia Co.
Posts: 16,281
Default Re: 3M 5200 to aluminum?

Quote:
Originally Posted by Quiet Riot View Post
I've got plenty of aluminum scraps if you want to grab some. Or if it's readily accessible and you/me can find a time I can weld in a patch.

Sent from my moto g(7) power using Tapatalk

Thank you for the offer,....I should be able to scrounge something up.
__________________
Welcome, to the days you've made.
IFisher 234

"Truth Matters"
garyk is online now   Reply With Quote
Old 07-28-2020, 11:18 AM   #10
garyk
King Salmon
 
Join Date: Jul 2000
Location: On the BIG River, Columbia Co.
Posts: 16,281
Default Re: 3M 5200 to aluminum?

Quote:
Originally Posted by Brokeass Boater View Post
5200 will take a couple weeks for full cure. There is a fast set, but still will take a week for full cure, I use this one mostly. It's not made for a quick patch, it's a sealant with a high bond formula,,,gregg

Yes.
I purposely selected the regular 3M 5200 for it's superior strength and not the quick cure. The boat will be on the trailer for several more weeks so there's no hurry.
__________________
Welcome, to the days you've made.
IFisher 234

"Truth Matters"
garyk is online now   Reply With Quote
Old 07-28-2020, 12:56 PM   #11
jbuck
Coho
 
Join Date: Apr 2012
Posts: 60
Default

If it were me AND ABOVE the water line. I would (and have) used large stainless fender washers on both sides gooped with 5200 and a nut and bolt to sandwich it all together. A stainless wire brush and acetone will clean it up well enough to start. When I was diving I did the same type of fix on a commercial boat except we used Splashzone instead. He fished with that patch for the rest of the season.
jbuck is online now   Reply With Quote
Old 07-28-2020, 07:47 PM   #12
garyk
King Salmon
 
Join Date: Jul 2000
Location: On the BIG River, Columbia Co.
Posts: 16,281
Default Re: 3M 5200 to aluminum?

Quote:
Originally Posted by jbuck View Post
If it were me AND ABOVE the water line. ...

Unfortunately, this is smack in the middle of the floor under one of the jon boat's bench seats. Apparently, this short stand-pipe affair was supposed to enable one to have some sort of live well. (It's a "Southern Thing", and no we admittedly don't understand trying to have live well in a 14' jon boat)
__________________
Welcome, to the days you've made.
IFisher 234

"Truth Matters"
garyk is online now   Reply With Quote
Old 07-28-2020, 08:49 PM   #13
Arne K
Ifish Nate
 
Arne K's Avatar
 
Join Date: Mar 2006
Location: Dallas,OR
Posts: 2,430
Default Re: 3M 5200 to aluminum?

Quote:
Originally Posted by garyk View Post
Yes.
I purposely selected the regular 3M 5200 for it's superior strength and not the quick cure. The boat will be on the trailer for several more weeks so there's no hurry.

5200 needs humidity to cure. You can strategize to ensure and/or speed up the cure.
__________________
24' Tolman Skiff Pilothouse "K-Newt"
Arne K is offline   Reply With Quote
Old 07-29-2020, 01:39 PM   #14
Labsforme
Chromer
 
Labsforme's Avatar
 
Join Date: Sep 2001
Location: Mission Valley,Mt
Posts: 799
Default Re: 3M 5200 to aluminum?

Marine-tex, Apply and do not worry. If you need to clean the surface as was mentioned use a stainless steel wire brush.
I use 5200 for a lot of uses but Marine-tex for that type of hole is very good.


Jeff
Labsforme is offline   Reply With Quote
Old 07-30-2020, 03:44 AM   #15
Macgyver
Steelhead
 
Join Date: Nov 2013
Location: Vancouver, WA
Posts: 220
Default Re: 3M 5200 to aluminum?

FLEX SEAL all the way, I saw it work on TV.
Macgyver is offline   Reply With Quote
Old 07-31-2020, 10:42 AM   #16
Halle the Hound
Tuna!
 
Halle the Hound's Avatar
 
Join Date: Jun 2010
Location: Kalama, Wa
Posts: 1,831
Default Re: 3M 5200 to aluminum?

Get some Lord Fusor panel bonding adhesive and a patch of aluminum. Sand the area to be patched clean, along with the patch piece and apply bonding adhesive. Hold pressure on patch till bonding adhesive cures. This stuff is the real deal and will not come loose if applied properly. I have used it many times filling holes in aluminum semi truck cabs.
Halle the Hound is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Cast to



All times are GMT -8. The time now is 03:05 PM.

Terms of Service
 
Page generated in 1.57781 seconds with 30 queries