Polyurethane can be used successfully outdoors if it has the proper ingredients. Look for a finish that has additives for ultraviolet protection. The label should say
Varathane 1-qt. Clear Satin Water-Based Outdoor Spar Urethane (Case of 2). Model# 250241H. (36). $2969. /case. Free delivery with $45 order. Set your store
Learn all about polyurethane, the long-lasting finish ideal for everything from. but interior polys should never be used outdoors; they lack the additives that .
Furniture intended for the indoors is never going to have as long an outdoor life as its. Even treated or rot resistant wood won't last forever.. . What do I need to do to this cabinet to weatherproof and paint?. . Anyhow, I coated it in a 5 layer high gloss polyurethane (home depot) 14 months ago and still looks like day 1.
How long will the waterproofing last?. The answer is no, polyurethane does not make wood waterproof even if you coat all sides and ends with multiple coatsâ€¦
Helmsman Spar Urethane is a clear finish that offers protection for interior or exterior wood. cabinets, bar tops, kitchen countertops, outdoor furniture, not recommended for floors. DELAYED EFFECTS FROM LONG TERM OVEREXPOSURE.. If unable to do so, wait a minimum of 72 hours, then lightly sand and recoat.