Unless the work was done yourself, your concrete is probably not sealed.  When moisture soaks into concrete and freezes, the water expands almost 10%, causing concrete to crack and flake.  Salt and chemical de-icers damage as well.  If concrete is not sealed, it will deteriorate.  

GLL Concrete Protection's “hydrophobic” penetrating concrete sealer protects the surface and infiltrates the pores of concrete, preventing weather and chemicals from further damaging the concrete.  The sealer will not change the appearance or the texture of the surface, nor will it discolor the concrete.

GLL Concrete Protection makes concrete resistant to salt, ultraviolet rays, and stains and also easier to clean.  While being environmentally responsible, concrete surfaces are protected from the effects of exposure.

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