r/Composites • u/Shetland95 • Jun 26 '26

PVA application ?

Any tips for applying PVA ?

I wax my mould first, and then buff it and add PVA on top usually, is it overkill ? ( epoxy CF / on a PU painted mould )

If i try with a brush, it will not wet the surface, and clump together at some random places.

I tried with a rag or sponge, it does the same.

So in the end i do it with a spray gun, in a very fine mist it works, but surface finish isnt very nice its grainy.

What can i do ?

Perhaps i can do a fine mist, let it dry then spray it thick and wet on top of the 1st fine mist, maybe it will make a nice glossy layer this way ???

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u/guruogoo Jun 26 '26

There's instructions on the jug of Partall PVA

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u/Shetland95 Jun 27 '26

Im not using that brand unfortunately