I have been using West Systems 404 adhesive filler added to my thinned down 30 minute epoxy. It seems to take longer to cure. I like to use the filler when I have any voids to fill so there aren't any air pockets. Does anyone know why it takes longer to cure? Plus even though it's cured it still remains slightly flexible beyond the 24 hour time. In a week or so then it is hard as a rock.
Barry
www.canopyrailsforwarbirds.com