I have a Mistral Flow, the white model 103 ltr 279 made of "plastic". After 5 years of copping a pounding the bottom delaminated over the front half. No reflection on Mistral, tough boards, just the life it had, although theres not a sratch on it. Was just about to ditch it when a Euro told me back home they drill holes in them, pour in a resin (?) put a giant sandbag on it, and its good for a few more years!. Anyone have an qualifed advice what type of product would be needed. This model incidently has no bung and it has lived in the roof of my van all its life, (which I suspect after reading a related thread contributed to it's demise! Cheers
Ahhh the flow. I can dig your attachment 
Read this:
boardlady.com/injection.htm
Then when you realise how valuable good information is, read the rest of the site. You'll then know how to go about fixing it 
Thats brilliant thanks! Who is boardlady anyway? Are there any photos? OK disregard that remark, but imagine being married to her! She'd never complain about you windsurfing an she could fix your kit when you bust it!
i have fixed a couple of boards . I would never drill holes and pour epoxy than put a sand bag on it unless the board is set up so you don't bend the rocker or concave out of it . what will happen if you drill and pour ,is that epoxy will pool in all the cracks and delam and could do more damage then you already got as epoxy heats up a lot and could melt the core . if you use sand bags on the delam on the bottom ( top is o.k) there is a good chance that you will leave a big concave where the sand bag is as the boards is soft in this area while the epoxy dries . if i didn't have a vac bag set up i would more than likely put weight (just enough to flex the board ) on the ends of the board just enough to flatten the delam . as for applying the epoxy i would cut slits with a razor blade at one end put some epoxy in the opening and use some kind of small heavy roller to push the epoxy between the core and the delam , this way you wont drill into the core and it wont pool and you can get the epoxy to every part of you problem .
maybe marry her daughter, if the skilled mum has passed on the knowledge. yer use epoxy resin and hook up a vacum bag system for best results, you can heat the epoxy just after you mix it so it flows better.. but not too much it is flamible.
You know you want one
