This is an absolutely fantastic read Andy. Been checking for updates daily, and this is my first post, which cant describe how awesome this project is! I mean ive started making small flat sheets and im learning as i go along, this is pure crazyness!

this is the back of one of my molds

smooth asa babys bum



I also easy lease my split mold joints and also use cheap bathroom sealer

cheers for the tips.... I managed to cobble together a bag from the bagging materials I had left, more joins than normal but was going ok and I even managed to get a full seal.

to stop any sharps on the back of my molds i have used roofing flashing tape

It is self adhesive and coated in rubber btiumin

Nakes the mold so smooth

Awesome stuff

£13 10MTRS 100mm wide

i had the same problem with my first split mould, i had some advice from here to say that he used silicone bathroom sealant on the joining flanges before bolting them together and got a perfect seal, it also rubs off after easily. the problem i had was where ever the bag was between the mould and the soft faced tressle it would have a hole

going well though andy watching with interest

You could try taping some breather fabric or similar over the joins on the underside where any potential sharp edges are.

The problem you have with fibreglass moulds, is it only takes one shard poking through to burst a bag. Although one tiny glass strand alone may not cause a massive leak, as the bag pulls it can tear the hole bigger. Hence why you need to spend a bit of time after cutting the edges going over the underside of the mould as well to check for sharp bits etc.

You will get there eventually!

I've enveloped bagged... not gone well, spent all day chasing leaks, I missed a few sharp edges on the rear of the mould, had another couple of deep recesses on rear burst and after 6hrs on it and getting close I could hear a very slight leak on the inner mould in the impossible to rear area so gave up.

With the fact you have soric and mesh, you shouldnt have problems with the resin not wetting out as the soric will help it flow through the carbon.

Also its such a large mould that the infusion could well take well over an hour so plenty of time for the resin to wet out as it goes and plenty of time for you to fiddle and adjust resin flow if theres any areas of concern.

Just out of interest, how have you sealed between the mould parts? or have you envelope bagged it to avoid any leak through issues?

spoke to matt and he gave me the same advise... the bag is massive, I pulled a vacume yesterday but after it got close to full vacume the bag burst so I scrapped it and went over the mould rear again and found some sharp areas were it could have been pieced... it looks like it bust on a few of the bolts despite being covered (well mostly lol) so I have taken them out one at a time and fitted much shorter ones and recovered...