Release agent on Uni Mould system.

Talk Composites - The Forum for Advanced Composites

Back

Release agent on Uni Mould system.

Author	Message
Spitfire	Spitfire posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 7, Visits: 25	Hi all I am currently producing a mould using the Uni Mould system (gel coat, coupling coat, tooling resin) for a project eventually using wet layup carbon. My question is regarding the release agent on the Uni Mould gel coat when I produce the carbon part, could I use a release agent such as Frekote NC 700 for releasing purposes? Would this be ok on the Uni Mould gel coat? Only reason I ask is that I have Frekote NC 700 ready to hand. Many thanks.
	Reply Like 2
Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Yes of course, it's perfect.
	Reply Like 2
Spitfire	Spitfire posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 25	Ok that's great, thanks for the reply.
	Reply Like 3
Spitfire	Spitfire posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 25	Also, regarding the mould surface once it is finished, would there be any benefit to applying sealer to the moulding face after lightly flatting it down with maybe 1200 grade wet 'n dry paper, or would it be preferable to leave the surface as-is and not touch it? Would there be any benefit to a sealing coat before a release agent? All the tooling-carbon moulds we produce (and tooling block) are always sealed before we use them, with Chemlease 712 EZ sealer, before using release agents. Would any sealer be necessary, or beneficial, with the vinylester Uni Mould gel coat? Sorry for the questions, but wet layup tooling and moulding is a bit new to me, I know where I am with pre-preg though!
	Reply Like 2
Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Yep, use the sealer. Composite moulds in general benefit from the use of a sealer, in fact metal is the only tooling substrate that doesn't.
	Reply Like 3
Spitfire	Spitfire posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 7, Visits: 25	Hanaldo (03/01/2016) Yep, use the sealer. Composite moulds in general benefit from the use of a sealer, in fact metal is the only tooling substrate that doesn't. I was in two minds about a sealer coat on the vinylester gel coat before the release agent. What made me curious is that no mention seems to be made in the tutorial videos about a sealer coat on vinylester gelcoat in the Uni Mould system, the release agent seems to be applied directly onto the gelcoat surface with no sealer beforehand. Could a sealer coat on vinylester be optional, in fact? (Regarding metal moulds, we do in fact use a sealer on machined aluminium moulds before a release agent, we apply Marbocote surface sealer before applying Marbocote release agent afterwards). Thanks again.
	Reply Like 2
Hanaldo	Hanaldo posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	That's because Easy-lease is a 2-in-1 system, so you don't need a separate sealer system. It is in fact optional though, I often don't apply a sealer. They increase the film durability, so you will get more releases with each application and a better service life from your mould. But you will still get many releases without a sealer.
	Reply Like 2