Water repellent sealers do just that, repel water. They chemically react below the surface to form a hydrophobic barrier within the pores that caused water and other liquids to bead off the surface. They do not leave behind a surface film or coating, they do not make the surface more or less slippery, and they are designed to last up to 10 years before the need for a recoat. The most common types of water repellent sealers are Siliconate water repellents, like the Armor SC25, and Silane-Siloxane blend water repellents, like the Armor SX5000 and Armor SX5000 WB. Siliconate water repellents require only one coat and Silane-Siloxane sealers require two. Silane-Siloxane blend sealers are better than using a Silane sealer alone, or a Siloxane sealer alone because a blend takes the strengths of each sealer without the weaknesses.

Water repellent sealers do not change the look or color of the concrete. If you were looking for a wet look, high gloss, or colored coating, you want an acrylic sealer like the Armor AR350 or Armor AR500. These types of sealers will leave a visible surface film and will protect water and other liquids from getting to the concrete. They are easy to apply and will last up to 3-5 years before the need for a recoat.