How Do You Paint Over Old Concrete?

Is it better to stain or paint concrete?

Concrete stain embeds the surface to color it translucently, while opaque concrete paint covers the top of the concrete but is subject to chipping and peeling when improperly applied.

Concrete stains go on quicker, dry faster and take less work than concrete paint, but they offer no significant protection..

Can I sand concrete?

The good news is that concrete can be sanded with relative ease when the proper equipment is used, such as a good concrete sandpaper (made using diamond instead of sand). There are also three different types of sanded finish you can achieve, depending upon the tools and amount of removed material.

What do you paint a concrete floor with?

(Epoxy paint is the best choice for floors, which take a lot of abuse. You’ll get the most durable results from epoxy, and it will hold up better over time than latex paint.) Be sure that both the primer and paint are suitable for the location of your floor, whether it’s an interior or exterior surface.

How soon can you paint after etching concrete?

24 hoursAllow the surface to dry completely before applying any coatings, paints, stains or sealers. Two gallons of mixed etching solution will cover up to 500 square feet. Allow to dry for 24 hours before staining, sealing or coating.

Can I use spray paint on concrete?

Spray paints and stains are handy for a variety of painted effects on concrete statues. … Most exterior spray paints adhere well to clean, unfinished concrete, and you can add a finishing coat of clear enamel to provide a glossy sheen and to make sure the paint stays put on the concrete.

Can I paint straight over concrete?

Masonry paint (also called elastomeric paint or elastomeric wall coating) is a good choice for concrete painting because it contains binders that contract and expand with the concrete. Exterior house paint can crack and peel on concrete. … No matter how you apply paint, let it dry for a day between coats.

What happens if you paint wet concrete?

Moisture under the slab can create hydro-static pressure that will actually cause the epoxy to separate from the surface, sometimes taking pieces of concrete with it. You can avoid this problem by doing a simple moisture test first to determine if your floor is suitable or not for an epoxy coating.

How long after it rains Can you paint concrete?

Rain doesn’t mean an end to exterior painting for good but you will need to stop before it rains and wait until the surfaces are dry to the touch to continue. The best thing to do is to watch the weather forecast, start early in the day, and allow for six hours of time with direct sunlight exposure.

How do you get paint to stick to concrete?

Use a trisodium phosphate solution or strong detergent to scrub the floor. Sanding with coarse emery paper may be required to give the old surface a rough texture for good paint bonding. Test a small area to make sure the new paint will adhere.

Do you need special paint for concrete?

The best paints for concrete contain binders that allow the coating to contract and expand with concrete as it cools and warms. Concrete porch and patio paints are frequently low-luster acrylic latex paints designed to conceal imperfections and resist fading, scuffing, cracking and UV damage.

How do you prepare old concrete for painting?

Clean the concrete surface with soap and warm water, removing any old paint. First, sweep away any surface leaves, debris, and dirt. Then remove any existing paint or gunk using a power washer or scraper and wire brush. Scrub away any dirt, grime, or gunk that is stuck to the concrete.

Do I need to prime concrete before painting?

Generally speaking, priming is so essential to successful painting outcomes, concrete will always needs a primer. However, the existing surface needs to be primed before painting if: It is unpainted. It is peeling.

How long does concrete paint last?

5 yearsHow long does concrete paint last? Most brands suggest that you apply a new coat every 3–5 years, depending on use. Some may last much longer if the area is protected from the elements or seldom tread upon.

How do you paint over concrete?

How to Paint ConcreteSTEP 1: Patch gouged or otherwise damaged areas with concrete filler. … STEP 2: Clean the concrete surface with TSP. … STEP 3: Let the surface dry thoroughly before you begin to paint the concrete. … STEP 4: Brush paint onto the perimeter of the concrete. … STEP 5: Roll on more paint to cover the interior.More items…

What is the best waterproofing paint for concrete?

KILZ® Basement & Masonry Waterproofing Paint is a premium, interior/exterior waterproofing paint designed for porous concrete and masonry surfaces.

How do you paint over a concrete floor?

It is not necessary to etch concrete floors that have been previously painted. Apply wide painter’s tape to the wall where it meets the floor to avoid painting the wall. Clear top-coat sealer may be applied over latex paint for added protection.