Painting a sealed floor ???'s

[car-nut]

Good morning, I haven't posted in quite some time. I did a quick search and didn't see my exact questions, so.....


Back when I built my garage, 36X28, I had the builder seal the cement floor. I should have painted it back then, but, live and learn. Now some 13 years later I have decided to paint the floor. Do I need to sand the floor first? Can I just etch it?

Also, the floor is saw cut in the center and I would like to use that dividing line to do half the floor at a time. I have far too much stuff in the garage and no place to put it all to empty it all out at once. I know it would be far easier to do it all in one application, but at the same time just don't see that as an option. Having said that, other than the job taking longer are there any downsides to doing it this way?

Thanks in advance for all and any thoughts and opinions.

Glenn

 

[SolarColumbia]

Do you know what type of sealer was used originally? Is it worn off? Does the concrete absorb water?
If you are putting down latex or one part epoxy paint you can get by with acid etching, but success of that will depend on the type of sealer that was put on.

 

[Tpsykes]

After 13 years there is a good chance the sealer. As solar Columbia said, see how it absorbs water. If you can't grinder the floor yiu may have to strip any existing sealer off before acid etching. What is your goal with the floor?

 

[car-nut]

I have no idea what type of product was used. The build of my garage did it. I spoke with a rep from PPG that sells these types of products. She told me that best process would be to sand or strip the sealer off. The etch and epoxy. I guess I will be renting a sander in the fall.
This is a working hobby shop in my back yard garage. Not just a place to store cars, but a classic car hobbits kind of place. So the floor needs to be durable enough to withstand all sorts of things, not just a car sitting on it.

 

[Tpsykes]

Grinding, epoxy primer with urethane topcoat is the way to go. We have had these thin mil systems in heavy manufacturing plants last more than 20 years.

 

[Shea]

The big question is do you want to paint the floor or do want to apply a nice coating system that will last years?. There is a big difference between the two and the way you would tackle the job.

 

[Garage Flooring]

The big question is do you want to paint the floor or do want to apply a nice coating system that will last years?. There is a big difference between the two and the way you would tackle the job.

This ^

Or be good with the idea that you will be posting the same thing in a couple of years (at best) and asking how to get the paint off

https://www.garageflooringllc.com/polyurea-garage-floor-coating-kits/
https://www.garageflooringllc.com/garage-floor-epoxy-kits/

 

[car-nut]

Ok, good questions. So I want the floor painted/coated, and want it to last. That's why I am here asking questions.

So I have learned that I will need to do something with the sealed floor coating. Is renting a machine from Taylor Rental and sanding it myself enough? I see they have 60grit discs that can be used. Is that course enough and will it do the job properly?

Or do I need to have someone come in and blast the floor? At work we had a company come in and sand blast/vacuum the floors down to raw concrete. Then the same company came in and laid down a primer, then next day the topcoat. It is said to outlive me. I'm sure this is the way to go, but I'm not looking to drop $5k just in labor and then materials on top of that just to coat my floor. I don't have that kind of ching.

Advise is very welcome.

 

[Tpsykes]

Again, you can rent a diamond grinder from sunbelt. Epoxy Primer with urethane top coat. Will last a loonnggg time.

 

[Armorpoxy]

As a safeguard grind off the sealer since sealers repel coatings.

Rent a grinder, use an epoxy, make sure to prime with your epoxy choice matching primer since you are grinding.