Which cheap sealant for filling deck holes?

coopec said:
I agree with Spirit(of Glenans) that we need to know what sort of deck the clutch was bolted to. Was it solid glass or glass with a timber backing pad? If it was solid glass I'd sand back the deck (around the hole) cover the hole with CSM and then paint it with anti-skid deck paint (if appropriate). If the deck is glass with a timber backing pad I'd fill it with epoxy and the finish it of the way the rest of the deck has been done.
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Why on Earth would you do that to get rid of some screw holes left by removing the clutches ?
 
To get rid of the old holes, i would drill them out a little bigger, which makes sure they are clean and free from any old sealant etc, then slightly countersink them with a bigger drill bit. Stick a bit of tape on the underside and pour them almost full of epoxy (leave a little depression for some flowcoat), no need to use fancy marine stuff or thickeners etc, Toolstation do a two part epoxy (same as Araldite) that costs about £2.50 and sets in minutes. Finally, get some flowcoat and fill the depressions. If you use gelcoat, rather than flowcoat, you will need to cover it to exclude air, or it will not dry properly, a bit of Selotape works well.
 
PaulRainbow has it nailed!

Or, if you have a Lidl closer than a Toolstation/Screwfix outlet, the German chain store has a Baufuix two-part epoxy product, in a pair of parallel tubes, which requires you just to squeeze the plunger. Does the same job as above; about the same price. Might even be the same product. Sets in a couple of minutes.
 
zoidberg said:
PaulRainbow has it nailed!

Or, if you have a Lidl closer than a Toolstation/Screwfix outlet, the German chain store has a Baufuix two-part epoxy product, in a pair of parallel tubes, which requires you just to squeeze the plunger. Does the same job as above; about the same price. Might even be the same product. Sets in a couple of minutes.
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I've also used the Lidl stuff, same tubes etc and as you say, probably the same stuff.
 
Thanks guys, lots of really helpful advice as always. Epoxy putty sounds great, have bought some from Toolstation & will give it a try on the next dry day (whenever that is.....). Butyl tape also sounds good although I have bought some silicone sealant as per the Spinlock instructions. Fortunately my deck is solid glass rather than cored, so that’s one less thing to worry about!
 
Rikds said:
I'll email you a powerpoint show on how to bolt down deck hardware if you'like. It's from a City and Guilds boatbuilding program I ran up until last year. I'd not use silicone on a boat if I could avoid it, many better products out there. Personally I like CT-1, but many butyls, polysulfides and polyurathanes will do the job. SABA is another excellent sealant.
Countersink the old holes and fill with thickened epoxy, tape behind to stop dribble!
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That’s a very kind offer, thanks, will PM.
 
If you do not want to burn your bridges, and to save messing about colouring the repair, you could fit a stainless dome headed machine screw with a washer, bedded in as you would any other fitting. No fairing or cosmetics to do, and you have the holes to use again if you change your mind.
 
i saw this on deck fittings which i thought was interesting about how to seal the holes. both new and old.


weather its the correct way im not sure but looking to drill a hole for a cable myself so this thread has some interesting thoughts.
 
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