Petrel Play SG Build - Filleting the Hull Interior on a Stitch and Glue Kayak - E5
After assembling the panels, Nick and Bill inspected the glued seams, sanded bumps, and removed temporary wires. He mixed thickened epoxy with wood flour to create fillets - radiused joints that structurally bond panels. Well-shaped fillets reduce stress and allow fiberglass to conform smoothly. Nick demonstrated mixing the two-part epoxy and adding wood flour to reach an ideal peanut butter-like consistency. He quickly dispensed fillets from a piping bag along inside seams before the exothermic reaction heated it up, then shaped them and cleaned excess epoxy. Nick emphasized getting the right consistency and working fast. Ideally fiberglass goes over tacky epoxy, but allowing it to cure first works too.