mast boot leak
You might try a product called Spartite. It is expensive but provides an elegant and long lasting solution. The two part mixture is poured into the mast cavity after building a dam with clay. Once the material cures (about 24 hours) it provides a perfect seal and yet still provides a certain amount of "give". The mast is sealed at the Partners. We used it on our Taswell 43 two years ago and would recommend it to anyone.