My 100gr/m2 chopped strand mat is on its way. But i've already applied the gelcoat on to the pattern (which is pretty complex shaped) surface. I've seen in the tutorial videos that the best way if you leave the gelcoat for several hours to cure before you applie the coupling coat. My question is: 1-2 overnight is still okay or it is a bit too much?
Shoud I continue the work with 225gr material which I have on stock?
Thx guys!

Hi Lego Man,

What type of gelcoat is it? Epoxy, Polyester or Vinylester?

I dont find 100g THAT much more conformable than 225g, so I would just use the 225g. Sharp 90 degree corners are the limit for 225, and 100g cant manage them either, so it's always best to find another solution for that. 

That said, I have laminated moulds after 48 hours without issue. I wouldn't do it for a critical mould that you are wanting to use many times, especially if it is sizable, but for a small mould that you can easily make again later and only intend to get one part out of, it tends to work out fine.

As per Hanaldo's comments, whilst 48 hours isn't ideal, with anything Poly/Vinylester, you'll often be fine because of the air cure inhibition giving the tacky reverse to the gelcoat - that's why I was asking, as Epoxy would be much more of an issue if it had fully cured but you should be okay at <48hours with the Uni-Mould.

Thx guys!