I just refinished a coffee table top with spar varnish. The top is made up of 3, 10" pine boards, rabbeted and overlapped where they meet.
These open joints are great collectors of dust, table salt, dust and anything that gets spilled.
My plan is to trim the joint edges (circular saw or router) to bare wood on the two opposing inside faces, put a bond breaker (string, shoelace) down at the bottom of the joint and apply a dark brown caulk of some kind, to keep liquids and debris out.
However, I do realize that the pine will come and go some and I have to choose the caulk well to avoid adhesion failure.
Any thoughts on what caulk will be fairly tough, resilient and adhere well to bare wood? I would prefer a flat finish.
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