About a year is all you'll get from any brand of sealer/finish product. There is simply not enough pigment there to protect the deck. Basic rule, the more pigment, the longer the deck remains protected. Just use a remover to get it off and restain.

And DON'T USE BEHR!!!!!!............ We had a very, very, expensive, very bad ordeal with Behr products on older PT deck - not DIY - with a pro - product was bad (pro was fine) Be happy it has worn away, so you can get the rest of it removed and change products!!! just my opinion!

We have an older treated wood deck that I am patiently (choke) waiting for DH to rebuild. I use solid stain on it (Maxum or Rez) and do have to do touch up areas in spring, typically light ones in walk path areas. Every couple years a good recoat on horizontal surfaces. Railings not so much, they last much longer.

However, agree to avoid Behr. I used it on rental property decks (small, one side and one rear). Side deck rarely used, mostly by the mailman. Rear deck was regularly used by two adults who were rarely home. Prepped and applied correctly. By end of that summer (only two months gone by) it was pulling off in walk paths and on top the railing. Then I googled and found a gazillion complaints about Behr stain on decks. Won't waste my time or $ on Behr deck stain again. :/

I have used the Behr Solid Color deck, porch and siding stain with great success. I have used other products over the years with varing degrees of success. The key to the Behr product is to READ THE INSTRUCTIONS! It applys diferently than some other stains. I also found that after several weeks of dry time a coat of Thompsons water seal over the Behr solid color gives a fabulous finish that holds up great!