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Types of Concrete Driveway Sealer

Types of driveway sealers
The most common types of film-forming driveway sealers are acrylic-resin based. Acrylic sealers provide the best performance characteristics for the cost, and they often are blended with epoxies, polyurethanes or silicones to improve performance, durability and water resistance. Acrylics, themselves, are also available in different forms, with some types delivering better performance than others. Styrene acrylic, for example, is a lower-performance acrylic resin that may yellow and degrade when exposed to direct sunlight. The best type of acrylic is a virgin or pure acrylic resin. These sealers will last longer than styrene acrylics, with no yellowing.

Other types of topical sealers for driveways are polyurethanes, epoxies and penetrating resins. Generally, epoxy or polyurethane sealers cost considerably more than acrylics and they tend to be higher build, and thus more slippery. They also don't allow for moisture vapor to move out of the concrete. It's important that sealers used on exterior concrete allow the passage of both air and moisture. If a sealer does not allow for this movement, especially moisture, white hazing or fogging can occur between the sealer and concrete (see Preventing Moisture Problems).

Penetrating sealers are made of specialty resins (silicones, siloxanes and silanes) that penetrate into the concrete and form a chemical barrier to water, oil and other common contaminants.

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