Internal Sealing of waterstop, 500ml

With keel stepped masts with internal water stops, the water stop can become leaking over time.

This can be sealed with some mast Internal Sealing.

500ml can be used up to JM 305D mast profile.

NB:
In many cases, it is rainwater from cables (VHF antenna, etc.) that ends at the bottom of the mast.
In most cases, this can be remedied by making an eye (a water gutter) on the cable with a small cable tie before the cable enters the mast.