Allow the surface to thoroughly dry remember concrete is porous so give it a day or two for the best results and apply a concrete sealer.
Sanding concrete walls smooth.
This sandpaper is made using diamond when traditionally sandpaper is made using sand.
After you have finished all the other steps it s time to give your concrete a new and fresh look.
Start at the bottom corner of one wall and in a single.
If you use a wet dry sandpaper you can wet the area before you work to keep dust down.
There are basically two methods used to smooth off hardened concrete surfaces.
Choose coarse grit sandpaper in the 40 to 60 grit range for basic sanding and stripping.
This grinder is mobile but still effective in smoothing rough uneven concrete before polishing with a fine grit grinding paper.
Wet the pointing trowel and hold it upside down as you scoop the mortar loading up its lower side.
Remove uneven patched areas of concrete by sanding it with an angle grinder.
For smooth finishes and removing minor imperfections use 80 to 120 grit sandpaper.
Rinse and repeat literally until you ve reached the desired smoothness.
They are dry grinding and wet rubbing.
These grinders are also hand held.
It s critical to your overall success.
Patches of cement are often uneven and stand out from the rest of foundational walls especially if cracks in the original walls necessitated the repair.
Spray the wall with a light mist of water.
Usually the patched areas are visibly noticeable even if the area gets painted.
Sack rub sack finish a finish for formed concrete surfaces designed to produce even texture and fill all pits and air holes.
Step 1 sand any particularly bad areas of concrete with rough grit sandpaper.
The best way to create a smooth surface for your wall is to limit your sanding and apply a thin overlay of correctly finished new concrete.
After dampening the surface and before it dries a mixture of dry cement and sand is rubbed over it with a wad of burlap or a sponge rubber float to remove surplus mortar and fill the voids.
For the smoothest finish use superfine sandpaper 200 to 400 grit or higher.
5 smooth the concrete.
The belt grinder is used strictly for removing and grinding large amounts of concrete.
Whether you are completing the project by hand or with a machine you will need proper concrete sandpaper.
If you don t use the right sandpaper you will not be able to complete the job.
Wipe the surface with your sponge to remove the debris then move to the next finer grade of sandpaper.