Prepare to mop the concrete with a trisodium phosphate solution tsp.
How to clean concrete walls before painting.
Examine the walls.
A thorough cleaning with a concrete safe cleanser lightens stains and usually removes them completely.
Smoothing walls before painting is necessary for surfaces previously painted with a gloss or high gloss paint.
How to clean interior concrete walls step 1.
Slip on a face mask and safety eyewear to protect your respiratory system and eyes from any harsh dusty residue released into the air by the.
Things that you need to clean before going to the next step of the cleaning times you have to prepare some stuffs.
For oil based paint a medium grit sandpaper 100 to 150 grit should be used.
Protect the floor around the walls with plastic sheeting.
How to prep walls for drylok.
For previously painted water based paint sand with a fine grit sandpaper.
I once tried cleaning a concrete garage.
How to clean concrete walls before painting.
Mop the tsp solution onto the entire concrete floor using a sponge mop.
Remove dirt and grease with trisodium phosphate 6 30 per quart concentrate or choose a more earth friendly cleaner like krud kutter s pre paint cleaner 10 for 32 ounces.
You can and should try applying common detergents directly to the tough spots and scrubbing with a bristle not wire brush.
But you may not get far.
Again wipe away any debris and allow to dry completely.
Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush.
The simple things that you can do in your exterior house 1.
A soft brush vacuum cleaner hose attachment.
So how to deal with those stuffs.
This will catch any drips from the cleaning solution.
Spray the wall as necessary.
Dust off the walls with a dry rag to remove loose dirt and dust.