Thickening Polyester with Silica question

[cterrebonne]

Originally Posted by Curapa

That's right, but I do know of a few people that pre mix large batches without hardener and take out small batches as needed adding harder after with success.

I do not trust that method, but I have never tried it. I've just read that is not advisable.

I mix the harder first then I add the silica. I do that because I never know when I have time to work on my boat and that resin may go bad before I use it.