We do not recommend it. Even though we have added one of the best UV inhibitors to our epoxy, The sun is a beast of a monster and over time, it can break down the UV inhibitor. Any color additives may fade over the years, and you might see yellowing after long exposure to direct sunlight. We have had clients use this on tables in a covered patio away from DIRECT SUNLIGHT and they held up fine. If you do place it in direct sunlight, we recommend adding a good quality varnish or urethane with HALS protection additives.