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Reply to: Tips, tricks, recommendations for sealing mast?

[quote=samc99us]When I sealed my A-Cat mast I used 5200 or maybe 4200. I tend to interchange them depending on what is open at the time-don't get me started on how the minimum quantity of 4200 and 4000UV is a 3oz tube that goes bad in about 3 months when kept frozen, and who has a freezer next to their boat shop? For this I would use 5200 black, or maybe the 4000 UV since its designed to be in the sun. Traphappy, find brand label of silicone!! Anyway mast sealing is a tricky subject, best is to dip it in a pool or down at the beach on a flat day, you'll see the bubbles instantly if you have a problem. Most masts aren't really just sealed, but have an air pocket built-in some how, i.e the top of the mast from the hound up is super well sealed with a bottom plug and a top plug. I suspect yours might not have this, but more likely you just aren't heavy enough to right the boat or often what happens to me on a high performance boat/foiler is you flip in a puff, puff goes away, you get your bows at 45 degrees to the breeze and the past perpendicular, you can get the tip clear but are still unable to get the boat upright due to a lack of breeze under the mainsail (think of water starting a windsurfer). If your mast isn't sealed you will turtle fairly quickly; doesn't sound like the case. If you want more flotation, you could stick a chunk of pink foam (from home depot) that is coated in epoxy in the top of your mast, say 30" long. You don't want it to contact the side walls except at the very top where it gets completely soaked in 4000UV black to seal out the top of the mast. If it contacts the side walls you will inadvertently change the bend characteristics of the top of the rig which isn't ideal. No one has to know its there since its internal, and we don't run halyards etc. through our masts so life is generally okay.[/quote]

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