Spartite is not a seal. In my previous use I put a bead of sealant around the mast at the top of the Spartite and put tape over the Spartite/mast partner join. I then put a Sunbrella wrap around the hole thing for sun protection and cosmetics.
Heading back to Lake Ontario for this summer. Ainia is back in North America for the first time since 2010. Currently in Long Island Sound.