What do you find is the best to use?
Iv been using PVA release but dont like it! iv just ordered some internal release, but think I will still give the mould a few coats of wax before hand.
Anyone use this method?
I also work fulltime in pre-preg, but cant get hold of the release agents we use! which is a shame because they are so quick and easy to use.
PVA sucks for sure, Look in to semi-permanent release agents such as frekote and various other brands which have different releases for different applications. Manderal releases are very high slip and generally not good for most applications. Dont forget to use a sealer.
I used always PVA, swithed to Frekote NC 770 and what a difference! Its like a dream. Best of all you dont have to spray it, just coat it with cotton cloth.
PVA sucks. Plain and simple.
Liquid semi-permanent release agents are the best as far as application and effectiveness, but carry a higher price. Paste wax works fine for most low temp uses, and although relatively cheap, the high labor makes it expensive to use in the long run.
PVA is great for crappy moulds and plugs!
but it (how do you tell this normal? edit, the forums shows X’s 
) messes up the surface on your product, even with good moulds/plugs. Easy to apply and demould, but a bad finish.
I like using semi permanents. But as far as home use, I use wax.
The problem I have with PVA is that it takes 30 minutes to dry and it can also rip. I’ve had situations where I’ve had to wait over an hour because my first coat of PVA ripped and I had to reapply it
Thats what i thought, that surely the time you spend using wax, it will end up costing just as much as forking out for a semi permanent! i think i will have to include some semi permanent in my next order.
Thanks for the help everyone!
And what about making mould from plug? Do you also use semipermanent or just wax on plug?
semi permanents work great for plugs, as long as the plug has been properly surfaced.
Jump in and say that i’ve used a few different semi perm releases from different manufacturers, and never got the same glossy result as with wax.
Sorry what do you mean plug? as in the standard component that i made a mould of? i used a few coats of wax and then PVA. but i really hate PVA so going to stop using it, i recieved my internal release agent today, so will have to let you know what that is like once iv used it! need to make another order this week as i need a few fittings for my pump so will include some semi-permanent.
At work we use chemlease 41-90 and have to say it makes life so much easier compared to wax or PVA! also it still gets a nice finish on the panel as long as the mould has a nice finish.
Yes, a ,model, from which you make mould. I hate PVA really. I had always problems with spraying it and dont have matte finish.