How to seal screws - deck hardware

regatta · #1 (**permalink**) 10-19-2011

Hello!
any advise to seale non trought bold screws? Procedure? Sealant?
Thanks in advance for any help!

Beersmith · #2 (**permalink**) 10-19-2011

I am also interested in this. I understand that butyl tape is the best for bolts, but I am still confused about screws. From what I have read, polysulfide is recommended the most for screws.

mitiempo · #3 (**permalink**) 10-19-2011

If you are using screws to attach an item to the deck I would use the same procedure as if it is through bolted. Sealant between the item and the deck with the holes for the screws countersunk to create an O ring where it is needed most. Sealant can be Sika Flex or 3M 4200. Butyl requires good compression and works best if the item can be through bolted.

What are you using the screws for?

regatta · #4 (**permalink**) 10-19-2011

thanks Mitiempo,
I used the butyl tape to seal trought bold like stanchion and big mooring cleats but i've a lot of stuff screwed only like small metal plates, screw for sprayhood, screw for small cleats etc etc..
I know the procedute for butyl and i did that..but i'm little confused for the other stuff.