RadonSeal Standard Deep Penetrating Concrete Sealer is a permanent, water-based concrete sealer and densifier designed to seal, strengthen and protect porous concrete from within. Ideal for basement waterproofing and foundation protection, RadonSeal penetrates deep below the surface and chemically reacts with minerals in concrete to seal pores and capillaries, helping reduce water seepage, moisture vapor, efflorescence and radon gas infiltration.Unlike topical concrete sealers and waterproofing coatings, RadonSeal does not form a film. The mineral-forming reaction becomes an integral part of the concrete, creating a permanent internal seal that will not peel, flake or wear away. The breathable treatment maintains the natural appearance of concrete while helping strengthen porous surfaces and reduce dusting, pitting and spalling.Ideal for poured concrete basement floors, foundation walls, concrete slabs and garage floors. Treated concrete remains suitable for paints, coatings, adhesives and flooring. The zero-VOC, low-odor formula is ready to use and easy to apply with a low-pressure sprayer. Recommended for indoor poured concrete less than 20 years old and outdoor poured concrete less than 2 years old. Also suitable for qualifying outdoor concrete, including driveways and patios, helping protect against freeze-thaw cycles, road salts and chemicals. One 5 Gal. pail covers approximately 1,000 sq. ft. of poured concrete. Color: Flat/None.