The Foundation Armor SC25 is a penetrating silane-siloxane concrete and masonry sealer that provides invisible, long-lasting protection against water infiltration on exterior foundation walls, block foundations, concrete block walls, and above-grade masonry. Unlike surface coatings that peel and require reapplication every 1–2 years, the SC25 penetrates up to 4 inches into the concrete matrix and chemically bonds to form a water-repellent barrier within the substrate. Water beads and rolls off for 7–10 years. The sealer is breathable — it lets moisture vapor escape from inside the wall while blocking liquid water from entering. A 5-gallon pail covers 400–500 square feet.

Key Features