Hi - My keel-stepped 67' aluminum mast has many halyard openings that invite rainwater and spray into the mast. This drains harmlessly into an otherwise dry bilge. Does anyone have experience with expanding foam or other solutions that would keep the water above deck level? I've thought of inserting a balloon into the mast at deck level and inflating it, thereby creating a plug to keep the foam from running down the mast. Will the foam create a good seal around the wires? Many thanks for your thoughts! Willy
Willy, Selden has a procedure for making a dam in their spars.
I had to get a radar cable through one of them once. What a pain.
At the moment, I am not capable of having a coherent conversation on the subject because I am half way through a Rays double header with the Yankees and am feeling no pain. But I can see if I can dig up further information on monday if you like.