recommended sealant for below water (aluminum boat)

Robbyracks

Cadet
Joined
Jun 27, 2022
Messages
26
Hey folks, tow questions:

Need to seal 2 bolts at the transom that are below the water line. What product would you recommend? I've come across the 3M 4200 and 5200 (the latter being permanent I believe?). This is for an aluminum fishing boat that is trailered and used in fresh water only.

Second question is, can I used galvanized bolts/washers for this type of application or other ? ZInc?

Thoughts? Thanks!
 
Last edited:

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,249
Use 4200 UV
Use stainless bolts
 
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