Please help me determine if I have a sealer

[evilcheese]

Please take a look at these pics and help me determine if there is a sealer or not on the concrete in my garage. The house is 25 years old. I sanded a spot with 60 grit sandpaper for a couple of minutes. Some of the water soaks right in and some does not. These were taken about 1 minute after dropping the water on. I'm thinking the years of dust and oil are making the water bead in places.

My dilemma is I can't find a decent diamond grinder to rent. They are either too small or too large. I'm thinking about using an orbital sander with 30 grit pads. I've searched and it seems people have success using this method. And I don't really want to use Acid. Beside the hazards, I live in a Town House and don't think the HOA would care much for this.

 

[LegacyIndustrial]

looks like it is not sealed to me.

 

[thegarageguy]

Looks like an old cure and seal.....best bet is to grind regardless. Hire a local pro

 

[st_sdoyle]

It looks pretty good to me. Behr Concrete & Masonry Paint Stripper worked good for me. It pulls up epoxy, sealer, and other stuff. Get it at Home Depot.

 

[evilcheese]

Thanks for the input. This board has an amazing amount of information. I spent the weekend cleaning and doing some etching. I cleaned and scrubbed using Simple Green and Zep Industrial Purple. The Zep stuff works really well.

I used this acid; Safer Muriatic Acid. http://www.kleanstripgreen.com/ It worked OK I guess. It did fizz and even smoked a little when put down. There weren't any fumes, so I was glad about that. This isn't the final etching. I'll do another round with the stuff that come with the Epoxy-Coat kits. I have an order on the way.

Please take a look and see if this looks clean and etched enough.

 

[st_sdoyle]

It looks pretty dang clean and etched to me. I would to the water moisture test over those glue marks just to make sure, and if that water soaks in then you are ready to paint that floor. I wrote in another thread to watch out while painting the recommended 2x6 sections. When I did mine my wife rolled on the the paint in one direction and then again in the other direction to get a smooth coat on, and then I would shower the flakes on, and she would start the next section. When we were done and the epoxy dried, you could see the sections when you looked at it in certain angles. Try to keep those sections well blended and keep the edges wet. If I had it to do over, I would get her to keep painting without stopping for me to put the flakes on to get continuous flow. It still looks very good and I am hoping the clear coat will help cover that up. Good Luck!