Breaking in mould. Does anyone do it? My moulds stuck!

Home
»
Advanced Composites Forum
»
Resin Infusion
»
Breaking in mould. Does anyone do it? My moulds stuck!

Breaking in mould. Does anyone do it? My moulds stuck!

Author	Message
carbon man	carbon man posted 4 Years Ago HOT Topic Details
Group: Awaiting Activation Posts: 86, Visits: 1.2K	So Iv had 3 moulds stick on me now. I'm using tr108 wax as it's advertised to reduce fish eye when gel coat goes into the mould. I have tried exact instructions on tin 8 coats and then leave over night before another coat. Also tried 5 chem release followed by 2 tr108 wax. I brush in polyester gel coat let dry. Lay up and infuse with epoxy In2 resin and cure in mould at 60deg straight away for about 8 hours so it gels fast in the event of a leak. The shiney parts of the mould released just about but everywhere else stuck like s***! But should I be laying in a layer of fibreglass and pulling that out once cured to break in mould first? Any help appreciated. Edited 4 Years Ago by carbon man
	Reply Like 4
Replies
MarkMK	MarkMK posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 338, Visits: 2K	Just to add that East Coast Fibreglass sell a brush-able epoxy-compatible gel coat. It's listed as EC 252, I believe. You'd then probably find more reliable releases by using a chemical release agent EC252 appears to be exactly the same as EC's GC50, but slightly thicker. If used for infusion, though, you might find some cosmetic issues as the inevitable brush marks might affect the way the fabric looks underneath. This is why it's probably more suited to hand lay-up, where a bit of excess resin will help the fabric 'float' over the rippled finish.
	Reply Like 2
carbon man	carbon man posted 4 Years Ago HOT Post Details
Group: Awaiting Activation Posts: 86, Visits: 1.2K	+x MarkMK - 6/24/2021 7:07:39 PM Just to add that East Coast Fibreglass sell a brush-able epoxy-compatible gel coat. It's listed as EC 252, I believe. You'd then probably find more reliable releases by using a chemical release agent EC252 appears to be exactly the same as EC's GC50, but slightly thicker. If used for infusion, though, you might find some cosmetic issues as the inevitable brush marks might affect the way the fabric looks underneath. This is why it's probably more suited to hand lay-up, where a bit of excess resin will help the fabric 'float' over the rippled finish. Hi mark, this is why I like the gloss coat so much as it drys smooth no brush marks. I had a go at spraying it in. And went well. I'd much sooner have a good brush in product that wouldn't fish eye tho lol
	Reply Like 2
MarkMK	MarkMK posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 338, Visits: 2K	The EC252 is epoxy compatible, though, so you shouldn't get any issues with the coating sticking or de-laminating. Careful application might limit any brush marks when it dries and a small gel coat roller will likely give a smoother finish. It doesn't fish-eye, even on a chemical release treated mould. Spraying a product like EC's GC50 is probably the best option, though, for epoxy compatibility and quality of surface finish.
	Reply Like 3