I am getting my tank ready for paint and can't decide if I want to do the sealer coating.
I just had bad luck with kbs sealer in my original tank that was pretty rusty inside.
I did everything correct but it ended up rusting under the coating and peeling off.
I have had seen other tanks with different brands peeling off too.
The new tank had very little rust so I flushed it with rust removal gel and cleaned it with acetone.
Now it's like new.
I have cream sealer and Eastwood sealer sitting on the shelf but I'm afraid to seal it , especially a rust free tank.
I would suggest if the tank is in good shape that you NOT seal it. My 1977 tank is original and has never had any sealant put in it (I bought my bike new in 1977). As long as one keeps fuel in the tank I believe it will never rust. The problem seems to occur when the tank is left empty and moisture accumulates in it. If your tank is not rusty I don't think it will ever rust as long as you keep fuel in it. Ed
Agree with Ed; no sealer. You might want to use a mirror and flashlight and look all over the inside of the tank to be sure there is no hidden rust. If there is phosphoric acid is what a lot of pro's use to derust and it works great.