Tung oil hardens when exposed to air, making the western red cedar we’re using for the Flow Boxes even more durable. It also makes it more beautiful — as you can see in this video from the other red Cedar 
DISCLAIMER: Tung oil is a natural treatment and may fade over time, we like it, and don’t mind natural weathering. If this weathering bothers you, exterior grade paint or other weatherproof wood treatments are good alternatives.
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Post time: Jun-19-2017