How long do concrete sealers last?
Well, there isn't just one blanket answer to that question. The actual life of a concrete sealer depends on the concrete sealer type, and and when the concrete sealer was applied, and what the concrete sealer was applied to.
Silicate Concrete Sealers: Silicate sealers last forever, and once applied, can only be removed if the concrete itself is removed. Silicate based sealers penetrate into the surface of the concrete where they chemically react to form a hardened crystal-like barrier within the pores. Once full reacted, there is no sealer left - all that is left is the crystalline barrier left behind from the chemical reaction. Silicate sealers do not change the look or color of the surface, and they don't leave behind a visible surface film. They work entirely within the pores to reduce the size of the pores and increase the strength and density of the concrete surface.
Siliconate Concrete Sealers: Siliconate water repellents last 5-10 years.
Silane Siloxane Concrete Sealers: Silane-Siloxane water repellents last 7-10 years.
Acrylic Concrete Sealers: Acrlyic sealers last 1-5 years on exterior applications and 3-7 years on interior applications.
Urethane Concrete Coatings: Urethane coatings last 10+ years on interior applications.
Epoxy Concrete Coatings: Epoxy coatings last 7-10 years of interior applications.
There are many factors that contrinute to the actual life of a concrete sealer. For more information on how long sealers last, view How Long Concrete Sealers Last.