I dont have a deck , but I just read about this ''new'' stuff called ''permaseal'', dont know if u can buy it, contractors advertising it here. Supposed to last for a really long time -30ish yrs or something like that --------
BBB complaints from customers who paid $4,000 - $8,000 say the promises from Permaseal are false and do not recommend the treatment. Anyone who guarantees any deck sealer or paint for 25 years like Permaseal has to be lying.
