Prepare bare concrete for coating or staining with Rust-Oleum® Concrete Etch. This citric-acid-based formula is easy and safe to use—indoors or out—and will open up tiny pores within the concrete to allow for maximum penetration and adhesion.

Best solution for water-borne coatings
Environmentally friendly, citric-based formula
Prevents dangerous acids or fumes; will not harm grass or plants