Clean Concrete Floor Before Painting

To make your concrete floors resistant to future stains apply a concrete sealant.

Clean concrete floor before painting.

Yank off any vines moss or other plant life covering the concrete. The best adhesion requires a clean floor free of laitance and contaminants. Cleaning and painting garage floors remove oil and grease spots. Thin the paint to be used for the first coat according.

If you are working on an outdoor piece of concrete flooring clean it of any grease. Remove dirt and grease with trisodium phosphate 6 30 per quart concentrate or choose a more earth friendly cleaner like krud kutter s pre paint cleaner 10 for 32 ounces. Wet the concrete and use a. Mix a solution apply to floor with a wet mop and then rinse with a mop dipped in clean water.

Things needed tape plastic bag flat shovel or scraper stiff bristled broom 5 gallon bucket degreaser or all purpose cleaner stiff bristled brush cotton rags hose electric floor scrubber with brush attachment or coarse scrubbing pad wet dry vacuum sprinkler can muriatic acid. Prepare to mop the concrete with a trisodium phosphate solution tsp. You want the surface to be as clean and bare as possible for the best coating of paint later on. Combine an ounce of trisodium phosphate tsp in a gallon of hot water.

Clean the floor of all oil or grease stains using degreaser. What is etching concrete. Cleaning concrete is a vital first step because the porous surface tends to trap dirt grease and oil. Laitance is a weak milky accumulation of fine particles of cement dust lime and sand fines on the surface of fresh concrete usually caused by an excess of water bleeding to the surface.

Mop the tsp solution onto the entire concrete floor using a sponge mop. Some good cleaners include castile soap liquid dish detergent stone cleaners and mild floor cleaners. Use a paint roller to apply it to clean primed concrete. Allow the floor to dry completely.

The acid can t penetrate oily patches and will leave an uneven subpar flooring. Before you power wash or paint seal your garage floor you ll want to attack any oil.