How to smooth a concrete wall finish step 1.
Sanding concrete close to a wall.
Do not try to make the wall level.
Press the grinder.
Attach a diamond sanding pad to a hand held grinder.
After sanding you should apply 2 3 coats of acid wash on the entire surface to hide sandpaper scratch marks from the concrete.
Once your mortar is made begin spreading it over a small area.
Remove the soap residue by rinsing the walls with a sponge and.
Wash the walls with dishwashing soap and water.
Sanding concrete using an orbital sander if you have concrete that is going to be exposed architecturally you can sand it by hand using wet and dry sandpaper or an orbital sander.
Trowel a 3 8 inch.
Also like sanding a concrete floor it is best to start with an area in a corner or near a wall.
4 thoroughly sand the concrete.
Sand any particularly bad areas of concrete with rough grit sandpaper.
The sandpaper you choose depends on the quality and intensity of sanding you want to do.
Roll liquid concrete bonding agent over the surface of the wall in fairly straight lines using a short napped.
The process of mixing mortar is relatively easy and straightforward as long as you have the right recipe.
Once you have everything prepared you will need to mix the mortar.
How to sand concrete walls step 1.
Usually the patched areas are visibly noticeable even if the area gets painted.
A diamond pad is the only type strong enough to cut through.
After you have prepared the area it s time to choose your sandpaper.