If you have a concrete floor that is dull and colorless, there are a number of options to brighten up the space. Giving a concrete floor a coat of paint will not only make it look brand new, but it will also be easier to clean.
Now when I say a coat of paint, I’m not talking about covering drywall with a single coat. There are more steps involved with painting concrete.
One reason is that concrete is porous. In fact, the pores constitute 12 – 18% of the material, but they are pretty much invisible to the human eye.
And since it is porous, it allows moisture to seep through, requiring a sealant. It also sucks up paint like no other.
Preparing your concrete surface is half the battle. Always start with a degreaser, as concrete can trap dirt and grease.
The next post discusses how to prepare your concrete floor to be painted:
Home Concrete Painting | How To Paint Concrete | HouseLogic
1. 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).
2. Yank off vines and moss growing on the foundation. Use a pressure washer to finish off remaining roots and dirt.
3. Remove efflorescence, a white powder that forms on moist concrete. Try Krud Kutter Concrete Clean & Etch ($8.50 for 32 ounces); if you need more cleaning muscle, try phosphoric acid masonry cleaner ($27 per gallon).
Read more here: Home Concrete Painting | How To Paint Concrete | HouseLogic
I always reinforce the importance of preparation, and when painting on concrete it is even more critical. Remove any old paint with a powerwasher, scraper or wire brush.
If there are areas of oil or grease that are excessive, you may need to use a heavy duty degreaser such as Simple Green. Tri-sodium phosphate works well but is harder on the environment.
If you are cleaning an exterior cement porch, some suggest etching the concrete to help the paint bond. This requires using an acid mixture, so be sure to have the proper equipment and clothing since it is dangerous to use.
Rinse thoroughly, let dry, and go over it one last time with a broom or vaccuum to get any leftover particles off the floor. Always let the concrete dry completely before painting.
If there are any major holes or cracks, you might want to fill them in using a patching compound. In the next video, the author provides tips for prepping and techniques that provide the best coverage:
Picking the correct paint is another crucial aspect. Choosing a masonry primer and paint will give the best results because they contain binders that contract and expand with the surface.
The next article provides more about choosing the right paint:
Apply 1 layer of concrete paint primer with a paint roller. Before adding your color, you need to use primer to ensure that the paint will stick. Apply a primer to the concrete to ensure strong adhesion of the paint. Again, follow the manufacturer’s instructions to confirm the necessary application and drying time.
If you are painting over an old color, or you are working outdoors, you may have better results with 2 coats of primer. Be sure to let the first coat dry fully before applying the second.
See original post here: How to Paint Concrete: 10 Steps (with Pictures) – wikiHow
Adding a second coat of paint fills in all the tiny holes that weren’t covered on the first coat. After plenty of dry time, using a sealant will give a shiny appearance to the surface. Following these steps will make your gray cement floor unrecognizable.