I have a tile deck over a sunroom.... Probably ought to be relaid... I have tried Ace water seal (no effect) and urethane clear coat... Worked well for a while but peeled up in the Texas summer sun.
I was actually thinking of trying future floor wax. Or automotive clear coat?
Deck is original to the house, vintage 1939. Treatments so far have reduced but not fixed the problem. I apologize that this is OT but you guys seem real handy about this stuff so... Help!!