Talk Composites - The Forum for Advanced Composites

Liquid PU casting resin over epoxy tooling gel coat for composite mould?

http://www.talkcomposites.com/Topic14782.aspx

By Faberge - 1/26/2015 3:06:37 PM

Can I pour liquid polyurethane casting resin directly over an epoxy tooling gel coat as a much faster way to make a split composite mould than by building up layers of fibreglass and resin as normal? It is a small mould so cost is not an issue.
By Abmod - 2/5/2015 10:38:45 PM

I believe there is a pourable Epoxy made by Devcon

We are trying to avoid the traditional multiple layers of glass here .

I've had great success with resin and sand , ratio of 1 / 5  , very similar to concrete . A bigger mould I just made came out great , super strong and rigid , but heavy .  Next one I will fill same space with foam , it will be poured in 2-3 stages to avoid build up .