How to remove sealer from concrete floors with chemicals.
How to wet sand concrete floor.
The process of mixing mortar is relatively easy and straightforward as long as you have the right recipe.
How to diamond grind a concrete floor to the correct concrete surface profile required before installation of an epoxy or urethane coating.
Cleaning step 1 move any furnishings from the floor you plan on sanding to another room or area.
For the smoothest finish use superfine sandpaper 200 to 400 grit or higher.
Additionally sanding can be an important step in resurfacing a treated concrete floor.
If you use a wet dry sandpaper you can wet the area before you work to keep dust down.
If you only have a small area to sand you can also use a palm sander orbital sander or belt sander.
In fact the chemical reaction between cement and water that binds sand and gravel together to make concrete takes nearly 28 days to fully complete.
Once you have everything prepared you will need to mix the mortar.
Apply an even coat of concrete sealer to the floor before resuming the sanding on the wet floor using a medium coarse abrasive in the range of 80 to 120 grit.
You will want to give a stained concrete surface special attention before sanding especially if grease is involved.
Make sure that the sealer penetrates the floor for as long as instructed by the manufacturer before you resume the operation.
This method can be noisy and damaging to the concrete.
The mechanical way involves using some kind of tool to physically grind sand or blast away the sealer.
There can be significant scratching or damage sustained during the process of mechanically removing sealer.
You need to sand the concrete floor by hand or with a sander so the new layer of paint coating can adhere to the concrete correctly and not just cover debris or old paint.
Also like sanding a concrete floor it is best to start with an area in a corner or near a wall.
There are a number of coatings that are suitable for concrete floors and one of these is paint more specifically epoxy paint.
How to grind a concrete floor to accept epoxy paint.