mould sealer?

[nevilleh]

All these question guys !

Is it worth puting mould sealer on my plug?

Ive only used it once and i didnt think it made much difference.

I have had problems before with the duratec sticking to the mould surface - i think it saps up the wax, so i was thinking the sealer may be the way to go for this .

Ive pretty much ruled PVA out - im sure I will be corrected though . I just cant see the point of getting a fantastic shine with the wax only to cloud it over with the PVA ?

Unless I should be reworking the new mould afterwards ?

[patiras]

I've had problems with just wax on duratec. I use TR 910 and 900 on duratec. No need to get it beyond about 1000 grit on the plug; the mould polishes up dead quick.

Al.

[Herman]

A mould sealer is your insurance. Get a well proven system that you are comfortable with, and that can be used in your circumstances. Do a test piece to see if the release is what you expect from it.

I see Zyvax products used, but also Ferro FS10, even just using their sealer, and putting Meguiar M87 on top.

I also see no point in using PVA, but for very bad moulds. I even made a polyester mould from a boat that was sanded with 220 grit. No shine, however...

[nevilleh]

yes, i think that is key - a test piece. thanks.

[jim lee]

Tend to disagree. We've had good luck wiping a thin coat of PVA on our plugs before making molds from them. Side by side tests, PVA released and without, the plugs came out in chunks.

-jim lee

[Herman]

My biggest problem with mold release is a too good release. If your plugs come out in chunks, something is definately wrong. I do have some suspicions, but that is for another thread.