Staining Exterior Concrete
Because they penetrate the concrete surface, most acid- and water-based stains have excellent UV stability and wear resistance, permitting you to use them on both interior and exterior concrete slabs (see The Types of Concrete Stains and How They Work). If you plan to stain a concrete driveway, patio, or other outdoor surface, just make sure to check that the concrete stain you use is suitable for exterior applications. Most manufacturers recommend applying a clear sealer to newly stained concrete for additional protection from abrasion, chemicals, and UV exposure.
Other precautions before applying stain to exterior concrete: