How To Clean Concrete Basement Walls Before Painting

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.

How to clean concrete basement walls before painting.

The next step that you can do is to wring the rag and then try to wipe down your walls. For exterior foundations and walls use exterior grade block filler such as behr s concrete and masonry bonding primer which also is good for interior concrete 17 98 per gallon. Next you can use a stiff or scrub brush with water that you already filled with soap to scrub the walls. Existing paint needs to be scraped and sanded.

If not properly wiped clean of dust and debris a new coat of paint runs the risk of peeling cracking and bubbling. How to prep walls for drylok. In order for the paint to adhere properly to your basement walls whether they are concrete or drywall they ll need to be cleaned off first. Concrete primer called block primer fills pores and evens out the surface.

Turn off the power to the basement and then use a utility pump with extension cords that reaches an upstairs outlet to get rid of the water. Fill a 5 gallon plastic bucket halfway with lukewarm water. Stir the solution until the tsp granules fully dissolve. Mix 2 gallons of hot clean water with 1 2 cup of trisodium phosphate in a mop bucket.

Scrape any areas with loose or flaking paint and lightly sand using fine 120 grit sandpaper. Lay plastic sheets on the floor next to the wall. Examine the walls. Prepare another mop bucket full of warm water.

Choose a clear silane or siloxane based water repellent sealer view example on amazon and apply the product with a. Scrub the entire wall briskly with a dry stiff bristled scrub brush or a stiff wire brush. The pump will discharge the water to the surface of. How to clean cinder block basement walls hunker.

Concrete sealer is a reliable option for avoiding stains in the first place. To make the best result in cleaning the concrete wall that is not already painted you also can add another bucket that you should fill with warm water. Scrub the surface with a long handled brush. Allow the concrete surface to dry.

Mop the tsp solution onto the entire concrete floor using a sponge mop.