I've been using Steve Smith's epoxy products for at least 35 years now for woodworking and remodelling projects and never once been disappointed. Well, there was one failure when the seam of a 16'-long darkroom sink came apart, but that was because I placed the flatsawn wood with the cup 'up' against the seam: with time and relative humidity changes, the joint pulled apart instad of pushing together. Lesson learned. CPES and epoxy filler are dependable and indispensable but you must follow Steve's detailed mixing and curing instructions to the letter.