Great product and lightning fast delivery.
I have a 100 year old bungalow in Chicago, with a 50-60 year old slab patio next to the house.  25 years ago we added a semi-circular concrete slab to the older one, expanding the patio.  Been loving it all this time but finally made the mistake of really looking at the patio. Pretty much green with algae .  Since May and June of 2020 gave me lots of free time, I scrubbed both patios with 30 second cleaner (also a fine product), wire brushed the many spots where the algae was "barnacled" to the concrete and finished the whole thing with a power wash.  Looked really good so I decided to seal it.  Researched online and decided to go with a water based siliconate penetrating sealer.  Foundation Armor SC25 was frequently recommended online so I bought 5 gallons.<br />IT WAS DELIVERED IN 2 DAYS!  But the best parts  were yet to come.  Used a paint roller for super easy application.  Panicked briefly when all manner of imperfections  in the patio popped out when wetted.<br />Within a few hours, the patio zits all disappeared and the color normalized between the two patio surfaces.<br />(amazing since they are at least 25 years apart in age)<br />This morning my wife spilled a bucket of water on the deck and it ran off like it was a ducks back!<br />Great product, great service.  Happy to write this review.
Rating: 5 stars