Waterproof and protect your concrete and masonry surfaces with ProteShield 1 gal. Elastomeric Waterproof Sealer. ProteShield's water-based, inorganic elastomeric polymer formula leverages an advanced rubber silicone component that penetrates porous surfaces and yields a protective and highly durable film. ProteShield will not yellow, crack or delaminate. Prevents damage caused by freeze-thaw, cracking, spalling and water-intrusion. Protects against ultra violet rays, ice, water-intrusion, chlorinated water, salt water, acid rain, salts and other chlorides, rust, mold, fungus, mildew, algae, insects, oil, fuels, stains and excessive temperatures. Recommended for many porous surfaces, including concrete, masonry, pavers, brick, precast concrete, plaster, drywall, GFRC, gypsum board, stone, tile, ceramics, foam, canvas, veneer, overlays, asphalt, wood and most types of metal (e.g. copper, brass, steel, aluminum, gold, iron). Commonly used on large (commercial) horizontal applications, including theme parks, city parks, parking lots, airports, roads, highways, bridge decks, piers, schools, helipads, tunnels, pipes, decks, walkways and driveways. Commonly used on large vertical applications, including (above and below ground) foundation walls, sound barriers and retaining walls, fencing and towers. Color: Milky white/ dries clear.