HERNY® 16377 SealPro™ High Performance Concrete Sealer, #635, 1 GallonHENRY 635 is a high performance, high solids concrete sealer that is easy to apply, quick drying, nonflammable and UV stable. Applied at a minimum of two coats, HENRY 635 is designed to protect all exterior absorbent concrete and masonry surfaces on residential and commercial applications, including driveways, sidewalks, patios, courtyards, walkways, pool decks and most vertical concrete surfaces. It is especially suited to seal HENRY toppings, and