Sealing a through-hull with CT1

[chrishelen]

Hi neeves,

the guy in the shop said it was ok for underwater fittings,i think it even said so on the tube. it cost about £10. yes 3 years no leaks, my boat is the yard for the winter and i dont know if i should reseal the fittings, it was such a cow of a job that i am tempted to leave it until next year.
good luck.

just re read your post, just to explain that my boat was on the hard when i used the ct1, the area around the fitting was damp, i dried it and cleaned it off best i could, then used the ct1, the guy assured me it was good for submerged stuff but i didnt want to take his word for it. dont know if it is still recommended for underwater.

 

[chewi]

I paid around 11 GBP from the chandlers, so it's probably available a little cheaper on-line (includes tax) so gives you an idea.

I got mine for about that price, but from British Central Electrical (of all places!)
Plumbers merchants had never heard of it, nor the chandlers.

dont think swmbo would like that stuff in the freezer.

 

[ghostlymoron]

I used to work with a firm constructing glass coated steel tanks. The plates were sealed with SIKA and bolts - lots of them. The Sika was applied and the bolts tightened. No re-tightening after cure - that's madness especially when you had in excess of 3000 bolts. We never had any leaks.

 

[alahol2]

I've used CT1 for the keel/hull joint fairing and after 2 years it's still fine. It's just not very easy to get a smooth finish on it because it's so sticky.
It's recommended for under water use see... http://www.ct1ltd.com/underwater-sealant.html.
For use by the OP, if he's got no washer under the screw-down retainer, I'd tighten fully straight away otherwise the sealant will tear.

 

[Murv]

Right, thanks for the replies. I do, however, have a large washer under the nut

 

[oldgit]

A thin bead of clear CT1 is very good at fixing weeping windows.

 

[Giblets]

A thin bead of clear CT1 is very good at fixing weeping windows.

Now that is very good to hear.

Hope it's better than Dr Tolly's Creeping Crack Cure.

(By the way OG, my Avast threw up a Malicious Site warning on your onestoptaxi link!)

 

[BERT T]

CT1

Usually the cheapest place to buy CT1 is a builders merchant. I get mine for £6 + vat, as I use quite a lot of it.

 

[Murv]

A thin bead of clear CT1 is very good at fixing weeping windows.

Is it any good for fixing the weeping owner though?