Black Mildew Stains on a Concrete Pool Deck (before)
Cleaned and Sealed from the Inside (after)
Concrete is very porous and therefore holds in moisture longer, providing a perfect petri dish for mold and mildew to grow. Spray on our Algae Mildew Cleaner with a hand-pump garden sprayer, agitate with a broom brush and power wash the surface to bring back the original look of your pool deck.
Once the deck is clean and dry, apply a saturating coat of Trojan Masonry Sealer using a hand-pump garden sprayer. The water based, polyester sealer will fill the pores and harden the concrete, yet will not be slippery as Trojan is a not a topical coating. Trojan will provide stain resistance and help reduce future mildew growth as it will permanently keep water & mold spores out of the pores of the concrete. Future cleaning will also be easier as dirt will not be imbedded deep in the concrete.