Quote:
Originally Posted by Billy V
That 3M 5200 sealant is excellent for through hull fittings.
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5200 was designed specifically for use with Marine thru- hulls. It's the standard of the industry and everyone uses it.
It is tough stuff. I once had to use a 2 ton jack to push out a 4 inch intake thru-hull (bronze) that was 5200'd in place and it still was not easy to get out. Shipyards commonly heat up large bronze through hulls with torches to compromise the 5200, other wise they are almost impossible to remove.
It used to be very expensive, over twenty bucks a tube, now it's come down do to the fact that non-marine stores like home depot carry it.
Actually for yaks a prefer the black version of 4200 which dries faster then 5200, both are more the adequate for sealing plastic threaded thru-hulls in kayaks.
Jim