Has anyone here used Spartite? Pros... cons?
Used it. Worked great! For about 6 months till we pulled the spar and it never sealed again.
I suspect the weakness of Spartite is the vaseline you are instructed to smear around the hole so it doesn't glue the mast to the cabin top. I may fabricate a removable chock system with neoprene rubber or something similar. To waterproof it, we'll make up a mast boot strip out of Sunbrella and seal it with rigger's tape. We pull spars every two or three years for inspection & maintenance so maybe it's best to stick with the old ways. Cheers!