Whew I have long contiplated an issue on our boat and just have to rectify this now.
So the issue on our boat is despite it being brilliantly built in so many ways it has a flaw I would like to rectify.
is shallow and flat ( not much I casn do with that ) but the big issue is the built in molded furniture and sole is one piece that would have been dropped in with the deck
This is done in 2 pieces, Galley
on port side across to the Nav area on Stb area and the salon
from port to Stb as a second piece. Both these are sealed to the hull
along the top edge and essentially hang just off the surface of the hull
all the way from port to Stb. at the turn of the bilge
is where the moulded unit comes in closest contact with the hull. maybe an 1-1.5" clearance and some of these spots would be very hard to reach.
The biggest issue is that any bilge water
is free to run up and inbehind the furniture.
Step one I have compleated is I made as many bilge access panels
as I could, to have better access. Step 2 I have cut out access panels
where prudent to also make more storage
of unused space ( but still many spots will be a difficult challange to access along the narrowing clearance area where the bilge area should cease).
So the question is what sealant
would be ideal to isolate the bilge from the rest of the hull? Once the acess areas are compleated and the bilge isolated the only way water
would get behind is if there was a breach in the hull.
An expanding spray product would be ideal as some areas need to be sealed blindly from as much as 1-1.5' (although I can use my inspection scope
post filling to see if it looks okay) But the ability to have water lay against it for long periods is a must so in my opinion spray foam is out for this area unless theres a product and way to acceptable use and post seal it afterwards?
Sorry for the long post but I hope I have explained it so people comprheand the issue and can better offer opinions.