regular West 105/205 or similar epoxies. G-flex mixes 1:1 and proportions can be a teensy bit less than precise.
The thicker quality means that you can spread it along the edge and it will form a more robust bead. If it drools the wrong way, just sand off what you don't want.
Try not to bash and scrape against rocks....
Canoe Pack Liner
4-place Boat Trailer
Full Size Sail Rig
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