Today i put to much weight on the corner of my board and it went snappy, any ideas of how it fix it, luckly i saw the broken bit floating next to me

Buy some epoxy resin from your local chandlers. Something like this:

http://shop.pinbax.com/index.asp?selection=detailed&uid=4639&itemtitle=SP106 - Click

Mix the epoxy with the hardner in the ratio according to the instructions. Be very precise with your amounts or it won't "go off". The best way to do this is with syringes.

Mix into this some microfibres. Something like this:

http://shop.pinbax.com/index.asp?selection=detailed&uid=4800&itemtitle=Microfibres - Click

Mix in small amounts of microfibres until it is about the consistencty of toothpaste.

Then use the mixture like glue to stick the two bits together.

Use sandpaper to neaten it up.

And Robert's your father's brother.

yes the screw method does make it less likely to break off but it doesnt mean it wont. when i snapped the corner off at stokes bay in the winter (dry capsize was a little energetic and my left foot was a little too far back) i was a little suprised to find i had two self tappers sticking out the bottom of the obard and as i fell off it my drysuit caught and the left leg filled up with water and i found later i had a lovely deep cut in my shin. when i got home i took some sand paper to it and just filed the back to a smother shape. TBH you will hardly notice any performance difference with just a tiny nick out the back like that.

I've done something similar but using a stainless bike spoke (15p from a decent bike shop) bent into a u shape, epoxied into two holes drilled into the board and then packed out to shape with filler.  Worked a treat and no risk of exposed sharp metal if the repair fails.

Ian

oo to late but in the end i used marine filler is that any good?

ask time intheboat, heres what he said on another thread (dinghy development, page 2, gelcoat repair):

I've just spent some quality time with my boat and here's some top tips of things I wish had done.

-   tape up outside the area being repaired
-  don't put too much on - it's a wotsit to sand off. better to build up.
-  try to get it as true as poss before you sand
-  if it goes in awkward places (centerboard case) work out first how you are going to sand it down.
-  get a white boat

Things I got right - eventually
- use epoxy not gelcoat for chips on the trailing edge of the board
- 400 is the lowest starting point 1200 is good to get that final smooth point
- lots of water with W&D - always use a block

ok thanks hopefully the filler will last

What's the problem with gelcoat? If it's for coating purposes that's exactly what the board is coated with from new.

Now that you've got the tip glued on, get some dawn grey gelcoat, sand the glueline so that there is a feelable dip, apply gelcoat wet & dry flat and the repair will be invisible. There is not really any need to paint.

If your fussy you can probably put your marine filler (Adequate but perhaps untidy) right with this method.

no idea im just repeating what ive heard.

Gelcoat is great at what it's intended to do - coat.

People run into problems, or rather repairs that don't last, when they try to build up large missing chunks with gelcoat. It's not structural.

However there is not really anything better to use to coat repairs especially to foils. Paint is too soft and tends to rub off on the inside of the boat leaving it a right mess, particularly with fixed rudders and daggerboards. I'd recommend damage to a gelcoated foil is always gelled not painted. As long as the repair is smooth, fair and polished it doesn't really matter what it looks like.

I've always thought that a shiny, high plished finish is best, but recent pics. of americas cup boat keels seem to show a matt finish?