Painting concrete is normally only considered when it is required to cover an existing slab or wall. For instance, after a crack has been repaired. For exterior areas that receive heavy foot or motorized traffic it is likely the concrete paint may wear away unless a high quality epoxy product is used.
Fresh concrete should never be painted. Allow the concrete to cure for at least 28 days-follow the paint manufacturer recommendations. Do not apply curing compounds to concrete which will be painted because these inhibit adhesion of concrete paints ad coatings.
Concrete walls should typically be the type that breathes so any moisture that comes up through the concrete can vaporize and is not trapped beneath the surface which could cause the paint to blister. The exception would be waterproof concrete paint such as Top Secret Coatings 1- Part Epoxy (TS-100) or Hard-Shell Urethane (TS-2) which are often applied to prevent the movement of moisture through the slab.
An option for consideration is an alternative to concrete paints are concrete sealers such as Seal-it! Penetrating Sealer (TS-104). This product provides improved resistance to weather, water, stains, and abrasives. Seal-It! also offers resistance to rain, sun, freezing temperatures, petroleum, and deicing salts. Concrete sealers make clean up easier than untreated concrete but do not improve traction or add color to concrete surfaces.
1- Part Epoxy is a remarkable concrete paint because it is catalyzed by oxygen rather than chemically making it the latest in coatings technology. It is far easier to use because it is not chemically catalyzed and produces a non-toxic film. This product out performs traditional two part epoxy in most categories.
1-Part Epoxy creates a high-gloss waterproof film that remains both hard and flexible at the same time! It adheres to almost any surface, seals, waterproofs and is resistant to chemicals, spilled fuel and acids. It is impact resistant to 500 PSI, heat resistant to 350 + degrees, color-fast, UV resistant, non-chalking and it resists cracking, chipping and peeling. Additionally, it covers three times the area of typical paint because its maximum dry film thickness is only two mils which is exceptional.
Before concrete can be painted, dirt, oil, and efflorescence must be removed form the concrete.