Sealant for aluminum?

[JASinIL2006]

Hi all, I've used 3M 5200 and 4200 on my fiberglass boat, but I need to install a below-waterline fitting on an aluminum rowboat. The applicationslist for 5200 and 4200 both fail to mention aluminum, so I'm assuming aluminum boats require some other type of sealant... what do you all use to seal thru-hull fittings on aluminum boats?

Thanks!

Jim

 

[GA_Boater]

Re: Sealant for aluminum?

Nothing wrong with 5200 or 4200 on tinnies. Also used for sealing through hull hardware which is typically metal.

 

[minuteman62-64]

Re: Sealant for aluminum?

I've used 3M 4000 UV to attach the bracket for my fish finder to the transom of my aluminum skiff. Still holding after 18 months.