Nope...50 years for paint?...not likely Most paints can do 10 to 15 years. This is for vertical applications...horizontal surfaces...like a deck. No way. I have an Ipe deck and this wood can last 60 to 100 years if properly cared for. I have seen painted (pine and redwood) decks completely fail when only 10 years old.
My ipe deck at 12...its now 15
You always have to use some common sense with exterior products. Peace and HandyANDY both do a ton of decks around metro Atlanta and if we get 2 to 3 years...MAX out of them...that's all you can expect. The products that offer "50 years" tend to be thick and CANNOT adhere to exterior horizontal wood for more than a couple of years. Wood is constantly expanding and contracting and will gradually cause the thicker products to crack...so slight at first that you can't even see the cracks. Water then enters the crack whenever it rains...and the product fails. The thicker products for decks might be a good idea if your deck is fairly split AND you want to spruce it up for sale. Other than that...you'll be better off with Sherwin Williams Maxwood or any Wolhman or Flood deck stains...which are now both available at Home Depot or Lowes. If you want the deck finish to last longer...it's all in the prep and quality of the products you use.