Get information about exterior concrete sealer products and what makes one sealer better than another for exterior use. Exterior concrete sealer products are designed and manufactured to endure harsh environmental elements including; wind, rain, snow, sleet, hydrostatic pressure (pressure from below / behind the surface) and sunlight. The two most damaging elements that will break down an exterior concrete sealer or coating are hydrostatic pressure (pressure from below / behind the surface) and sunlight.

hydrostatic pressure - When choosing an exterior concrete sealer or coating you must select a "breathable" sealer or coating. The reason for this is to prevent premature delamination. Breathable concrete sealer and coating products will allow moisture and vapor under pressure from below the surface to pass through and release out. If you apply a non-breathable material the pressure may build high enough to eventually push the coating or sealer away from the surface causing premature delamination. *In just about all applications that do not have a non-breathable vapor barrier beneath the substrate, there will be some level of pressure pushing up from below.

Sunlight - It is an unfortunate truth that sunlight will eventually be the "Achilles Heel" of all concrete sealer resin. Sealer resin breaking down from sunlight is called photodegradation. During this process, the resin will become harder and harder until it eventually begins to frey, causing the resin to break apart and degrade.

Consensus When selecting an exterior concrete sealer it is important to use a material that is not only breathable but also UV stable to prevent premature photodegradation and/or premature delamination. For exterior concrete it is recommend to use an acrylic based concrete coating or a silica based penetrating concrete sealer such as silane, siloxane or sodium/lithium silicate. These are breathable options that will provide excellent life expectancy and performance.


Armor SX5000 Penetrating Silane Siloxane Concrete Sealer and Masonry Water Repellent (5 GAL)

Armor AR350 Solvent Based Acrylic Wet Look Concrete Sealer and Paver Sealer (5 GAL)

Armor AR500 Solvent Based Wet Look High Gloss Acrylic Concrete Sealer and Paver Sealer (5 GAL)

Armor UTN60 Oil and Gas Resistant Aliphatic Urethane Concrete Floor Coating

5 GAL Armor S2000 Concentrated Sodium Silicate Concrete Densifier Sealer and Surface Hardener

Armor SC25 Siliconate Water Repellent Concrete Sealer with Salt Guard (1 GAL)