Really enjoying my new foil. Has brought my proning to a new (comfortably intermediate) level. Unlike my old slingshot setup however, the mast leaks/holds a ton of water. Supposedly not uncommon.

I did look around on other posts that revealed both successful & unsuccessful attempts at sealing it.
- Simple bathroom silicone (Additional suggestion was pushing a small sponge in for silicone to form a base against)
- Using marine putty stuff (2 parts mix together to go off)
- Don't bother....deal with it...or just upgrade the 2018 SS with the (very complimented) 2019 76/84cm wing

I saw the gong foil offers mast plugs....good Idea...but not an option on my current one.

Just wondering who has done with success....and not? Sincere thanks to learn from your experiences.

What would be really annoying for me - would be water stuck in the mast that wouldn't come out

Silicone is made to keep water out.

If you do it properly, the chance of water getting in is pretty much zero.
If you don't do it properly, it's only silicone...

Just get up in there with a drill or blade, drain it and seal it again.

Very nice, much neater than mine. I'm sure it'll work perfectly.

Thanks for the inspiration clamsmasha.

Hdip, foil really goes well but just so annoying to have to empty each session...if this works it will definitely keep me frothing on it for a while....

Chances are it will still leak and then be almost imposible to get water out, so no from me

I did exactly the same sealing job. Clean with alcohol. Foam plugs. 15mm Sikaflex marine sealant.

In cold water the air inside contracted and dislodged the sealant and water got in. It was pretty easy to push the plugs out with a length of dowel and clean it all up.

I did this some months ago with expanding foam stuffed down and topped up about 7-10mm of silicone. 100% watertight. But the screw seems to leak just enough through the threads?? The pressure must have gotten the best out of it. Thats mine experience. Please let me know if anyone gets a better result.

anders884 said..
I did this some months ago with expanding foam stuffed down and topped up about 7-10mm of silicone. 100% watertight. But the screw seems to leak just enough through the threads?? The pressure must have gotten the best out of it. Thats mine experience. Please let me know if anyone gets a better result.

The screw channels won't be water proof unless you jam som silicone down beyond the reach of the screws. I did that and worked, but had the added benefit of working like Tefgel or the like.

I pushed my sponge "backing plates" in about 2-3cm in the general mast holes but about 6cm on the screw holes....to still get same 2-3cm seal below the thread....screwed the threads twice immediately after injection...