Concrete – How I prep a concrete garage floor for painting
concretepainting
Is there any special considerations for painting a concrete garage floor as opposed to any other concrete surface?
I'm thinking in terms of foot and tire traffic.
Best Answer
I have found an acid etch is about the best and easiest methods. Most masons use muriatic acid at 15-30% with water you can go stronger but this is normally strong enough to etch the surface looking at your photo 15% may be plenty. I use a 2 part epoxy made for garages , don’t go cheap or you may find where you park your vehicle the paint peeling where you stop when the tires are warm. With plain concrete paint I have seen it peel up along the tire path not just where the vehicle stops. Since you are in a garage there should be plenty of ventilation and ringing is easy with a squeegee (that’s what I use) a floor squeegee. I would caution a really nice coating looks super but I spilled some antifreeze on mine one day and it was so slick I could not stand up so now I add a traction powder, you really can’t see it but it is not so slippery.
Remember aaa always add acid to water to prevent an exothermic reaction and possibly having the acid splatter when it boils.
muriatic is used in swimming pools to adjust ph all pool stores have it as do most home improvement stores for cleaning and etching concrete.
I'd suggest a french drain around the sides of the garage. This requires that you have somewhere to output the drain, and it also involves a lot of digging. But it will work much better than waterproof paint.
Short of that, check the grading of the land around the garage and make sure everything slopes away.
Probably yes. And probably an oil based primer unless the can says otherwise. On top of that a concrete primer if they exist. If you don't prime then you run the risk of the paint peeling, especially since garage floors are so smooth. Plus you might run through way more paint than you think and need to get more since concrete is so porous, it will soak it up like a sponge. You don't have to of course, but how much is the paint vs primer? If paint is more get the primer as well. And get an extension pole for the roller and everything will go fast.
Best Answer
I have found an acid etch is about the best and easiest methods. Most masons use muriatic acid at 15-30% with water you can go stronger but this is normally strong enough to etch the surface looking at your photo 15% may be plenty. I use a 2 part epoxy made for garages , don’t go cheap or you may find where you park your vehicle the paint peeling where you stop when the tires are warm. With plain concrete paint I have seen it peel up along the tire path not just where the vehicle stops. Since you are in a garage there should be plenty of ventilation and ringing is easy with a squeegee (that’s what I use) a floor squeegee. I would caution a really nice coating looks super but I spilled some antifreeze on mine one day and it was so slick I could not stand up so now I add a traction powder, you really can’t see it but it is not so slippery.
Remember aaa always add acid to water to prevent an exothermic reaction and possibly having the acid splatter when it boils. muriatic is used in swimming pools to adjust ph all pool stores have it as do most home improvement stores for cleaning and etching concrete.