Hi Matt, just a fast question:

If I have made a pattern of PU foam, can I use it directly with Uni-Mould System or should I put some putty all over the pattern before I apply the release agent? In that case which would be the best?

Waiting for your reply, thanks!

Regards!

Hi,

You'll certainly need to 'surface' the foam with something to seal it, harden it and allow it to be polished up to a high standard. On its own the foam is not a suitable release surface.

For coating the foam pattern I would suggest epoxy coating resin and a layer of lightwight 163g glass coth and then additional applications of the epoxy coating resin with microballoons and fumed silica to make it thicker and more sandable. You should then be able to flat and polish this to a high standard ready to take your moulds off.

-- Matt

Matt Statham
Easy Composites / Carbon Mods - Technical Sales