IF YOU NEED A BREATHABLE SEALER THAT WILL STAND UP TO THE ELEMENTS FOR 5 OR MORE YEARS, EASY SPRAY ON APPLICATION, AND DRIES CLEAR, THEN THIS IS YOUR PRODUCT. STONE VENEER IS ONE PARTICULAR APPLCATION AS YOU NEED TO ENSURE THAT MOISTURE DOES NOT GET TRAPPED BEHIND THE STONES. 2 COATS, ONE AFTER THE OTHER, PROVIDES ALL THE PROTECTION YOU WILL NEED. WHILE THIS IS A NEW APPLICATION FOR ME, WHEN I'VE USED PRIOR ON CONCRETE, I HAVE HAD LONG LASTING RESULTS WELL OVER 5 YEARS, EVEN IN HIGH SALT AREAS.