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.
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.