Concrete Sealing – Epoxy Sealers

Superior abrasion resistance and a high-gloss sheen makes epoxy sealers ideal for high-traffic floors and concrete countertops

Epoxy sealers form a high-build protective film on the concrete surface, producing a hard, long-wearing, abrasion-resistant finish. They also offer excellent water repellence. They are available clear or pigmented, if you wish to add color. Most products impart a glossy finish. Epoxy sealers are much harder than acrylics. Water-based epoxies bond well to concrete and provide a clear finish, but they are nonporous and do not allow trapped moisture to escape. Epoxies are probably the best choice for concrete countertops and food-preparation areas.

Concrete Acrylic Sealers

For great performance at a low cost, acrylic sealers are a good choice

Available in both solvent- and water-based formulations, acrylic sealers are ideal for projects where easy application and economy are important. They can be used on both interior and exterior surfaces to form a thin, protective film that provides good protection against water and chloride intrusion while permitting moisture in the slab to escape. They are also UV resistant and non-yellowing. Available in a range of sheen levels, they also can be used to enhance the beauty of colored, stamped or exposed-aggregate concrete.

On indoor surfaces, acrylic sealers usually require regular maintenance with several coats of a sacrificial floor finish, or wax, to prevent wear and black heel marks.

Penetrating Sealers for Concrete

Penetrating sealers provide excellent protection against outdoor conditions

Penetrating sealers, such as silanes, siloxanes, and silicates, penetrate into the concrete to form a chemical barrier that shields against moisture penetration and deicing chemicals. Usually they provide invisible protection without changing the surface appearance, and most products are breathable, allowing moisture vapor to escape. They are most commonly used outdoors, since they provide excellent protection against harsh exposure conditions.

Polyurethane Sealers for Concrete

Use these high-build sealers to produce a very durable, chemical-resistant finish

Polyurethanes sealers are nearly twice as thick as an acrylic sealer and form a high-build protective film on the concrete surface that provides excellent resistance to abrasion and chemicals. They are available in water- and solvent-based versions and a range of sheen levels. They can be used on both interior and exterior concrete to impart a transparent, non-yellowing, highly durable finish.