What is the best material and method to seal the planks of a Mahogany Cabin on a 1956 Monk Motor Yacht?

by Grant Drummond
(Vancouver BC Canada)

Hello. I own a 1956 Monk 40 Ft Bridgedeck Motor Yacht.

I have several topside Cabin leaks.

I am wondering what is the best material to use when re-sealing the planks of the cabin?

The Cabin is made up of mahogany planks that are stacked end on end.

It does not look like a tongue and groove design.

Should I be using Sicoflex to seal the cracks or do I use a seam compound of some sort?

Thank in advance,
Grant D.

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Sikaflex
by: Captain Hugo

Sikaflex, white or black, is a good product.

Once applied, use a little detergent in water to smoothen surfaces with your finger if need be.

Once fully cured, it can also be sanded smooth . . .

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