HELP/PAINT: Can you paint outdoors or exterior surfaces?
Yes, for outdoor application, Apply over correct hydrostatic pressure dry concrete (test: completely tape a 4’x4’ plastic sheet over all edges to the substrate. Coating can be applied if the area under the plastic sheet remains dry after 24 hours). For a thicker total coating over concrete (5-10 mils dry) mechanical scarification or acid etching until a suitable profile is achieved. For a total coating over 10 mils dry, use a fine brush blast (shot blast). Apply in 50-90 degrees F with relative humidity between 60-90%. Allow air flow while keeping from moisture for 72 hours.