Concrete sealers will help to restore your concrete, protecting it from water, salt, UV radiation, and other such harmful aspects of environmental conditions. An untreated concrete driveway will crack and discolor, allowing weeds and grass to grow up through the cracks, making your home look far worse by association. Fortunately, the fix for such problems is cost effective and easy to apply. A quality concrete sealer will ensure lasting protection for your concrete.
If you live in an area of the country that uses deicing salts on the roadways the best product to use is a silane/siloxane sealer like the Siloxa-Tek 8500. The 8500 is able to resist spalling, pitting and cracking from harmful deicing salts and chlorides used on the roadways as well as prevent damage cause by freeze-thaw cycles.
If you are looking for deicing salt protection as well as oil, grease and staining protection (ie: leaves) the best product to use is the Siloxa-Tek 8505 (water based) Siloxa-Tek 8510 (solvent based).
If you live in a warmer climate with no freeze-thaw cycles and no deicing salts you can use the Lithi-Tek 9500 for waterproofing, mold, mildew and efflorescence protection.