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Concrete Floor - Seal before painting or not?

R

RTR

Well-known Member
We are in he process of converting our old chicken house into a workshop. It's an 18'x30' building with a concrete slab that we built about 35 years ago. The floor never had anything put on it and is covered in 35 years of dirt and dust. We just swept it good and cleaned the building out. I really don't want to pressure wash the floor because I would be afraid it wouldn't dry out well or would take a long time to.

My question is ........I want to paint the floor with a concrete paint so it will stay cleaner and clean up easily. Do I need to purchase a concrete sealer and apply that first? Or is concrete paint and sealer the same thing?

Second question.......do I have to actually wash the floor or will it be ok if I apply it to the freshly swept floor ?
 
First, I pressure washed a concrete side walk a few days ago, it dried right away.
Second, go to Sherwin Williams, they are great at helping you figure out the best way go.

Dusty
 
The accumulated Ammonia from 35 years of chicken poo might cause a problem . A wash down with diluted Hydrocholric acid [ muriatic] might be in order .
 

Here are pictures of what I'm working with. It's fairly clean for the conditions because we used to have several carpet remnants on the floor as a covering and changed them out about Every 10 years


mvphoto23863.jpg


mvphoto23864.jpg


mvphoto23865.jpg


mvphoto23866.jpg
 

Chickens would only stay in there when they were in Separate stall pens which have been removed. They only were in this building when we put them in there.....not that often. It was previously enclosed until we cut the wide openings in the wall about 4 years ago to use as a tractor shed
 
If it was just dust and dirt that could be swept off well enough. I'm seeing stains of something on the floor. I believe I would pressure wash those spots and if it's oil wash it with purple power before pressure washing. It won't take as long as you think for the concrete to dry enough to paint. A couple of days with some ventilation and you would be fine.
 
Wash it and work on it. Paint ain't gonna hold up if it is real shop.
I don't understand why any body paints a shop floor.
Richard in NW SC
 
(quoted from post at 05:28:08 07/07/15) I would not even consider painting unless I pressure washed first. Ellis
Click to expand...

Ok. I'm go gonna wash it with the pressure washer. Now what kind of paint don't get that will act as a sealer too? Or do I just need a sealer first then paint? I know it can be done and will hold up because I've seen too many already done like that
 
You right in pressure washing it and then wash it down with muriatic acid. Then paint it with a good concrete paint. It will last a long time if you let it cure before you run on it. That could be a week or so in higher humidity.
 
I had poured a 30 X 30 pad out the rear door of my warehouse for a pallet storage so the fork truck could stack and unstack them. I added a 100' X 100' warehouse over the area the pad. The contractor poured around the pad for the warehouse floor and mopped the pad with muriatic acid and rinsed down with water. They sealed all of the 100' X 100' floor. After 20 years of use it still all looks the same. You really need the old floor free of dirt and dust to get a adherence of the sealer before painting or plastic coating. A good urethane sealer will keep paint or plastic coatings from lifting. All 25,000 sq, feet of my plant floors was sealed while the cement was just able to be walked on without marking. You don't have to worry about the floor drying for an extended time before sealing. When it looks dry you can successfully seal it. The contractor sealed all of my floors with a common garden sprayer.
 
I would refer to the product data of what you intend to use to determine what is called for to prepare the surface. I have seen specifications calling for acid washing or glass beading to prepare for epoxy or paint. You want the substrate, (concrete) to bond to the top coat, so its best to follow the manufacturers instructions.

You may have other options, here is a link to the Euclid Chemical Company, they make lots of commercial grade concrete coatings.
Euclid Chemical Company
 
That must be an interesting product, as typically most would require the 28 day cure on the concrete. Sounds like what you have performed well, good to hear about that !
 
I would acid clean or rent a dimond tip floor grinder then power wash. You have to make sure there is no moisture
coming up through the concrete the way u do this is by taping plastic in 2 by 2 squares to the floor let them sit for
couple days if there is condinsation on plastic don't paint Nothing will stick. If no condinsation don't seal just paint...
I like concrete stain though.
 
I've never seen a used concrete floor hold paint. Maybe that's because whoever prepped them didn't do it correctly? I don't know. I've never seen one successful though. One of my barns has a concrete floor. If I had to do it all over again, I would only put in a pad for working on, but certainly not the whole thing again. They poured the concrete, no one was allowed on it until after it cured, and that was to prep it and then seal it. Sealer didn't seal so well, so...

Much good luck.

Mark
 
Several years ago I put up a new tractor shop. A few days after the concrete floor was poured we hosted a reunion. My wife and I swept that floor about 3 times and the brooms pushed hard. A few days later per Sherwin Williams, I sealed the floor, now that floor sweeps very easy.

Dusty
 
RTR,
I've never had any luck making paint stick to concrete floors. If your old tractors
drip oil like mine, get ahead of the oil on floor problem and pour oil all over the
floor. That way it wall all look the same.

Get a 4000 psi pressure washer and blast the top layer of concrete off. When it gets
dirty, do it again. Buy large bag of oil dry. I like to use sawdust too. If the
chickens pooped on floor for 35 years, why paint it now?

3 years ago I helped neighbor cover his chicken coop, dirt floor, into a hay storage.
I go so sick, histoplasmosis, I thought I was dying.
histo.
 
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