What sealant is used on thru-hull deck bolts?

[mitchmiller]

There is water leaking around the bolts which attach the genoa jam cleats on my 2006 26M. I took off the mirror cover and can see the drips. There is a soft white sealant on the nuts and bolts that is still soft and tacky. First I want to put more of this sealant to try to fix the leak.

If that doesn't work, I will take off and re-set the cleats - but they nut and bolt will still need to be sealed anyway.

Does anyone know what type of sealant was used?

[kadet]

You can use a marine polyurethane sealant like Sikaflex - 291 or 3M 5200, note these also double as adhesives as well.

[seahouse]

http://www.westmarine.com/buy/captain-t ... oz--243990

This will fill small cracks and voids of the type you mention by capillary action, but is not the factory sealant.

[Seapup]

Good how to on rebedding hardware so it will last:


http://www.pbase.com/mainecruising/rebe ... are&page=2




I have about 300 of my 400 leaks stopped on the other boat using it and wished I had tried it sooner.

[Paul S]

Good how to on rebedding hardware so it will last:


http://www.pbase.com/mainecruising/rebe ... are&page=2




I have about 300 of my 400 leaks stopped on the other boat using it and wished I had tried it sooner.

Yes their butyl tape is the best and only choice.