How to Seal & Repaint Block Walls

  1. Prepare the area. Remove rugs and furniture from the room. …
  2. Strip off the old paint. Apply chemical stripper to the walls using a large paint brush. …
  3. Wash the wall using dish detergent with grease cutter. …
  4. Apply silicate-based concrete sealant. …
  5. Paint the walls.

Can you paint over block sealer?

You can paint over concrete sealer but you’ll need to clean, sand, and prime the top layer of the sealer before painting over it. The prep work is to abrade the surface and remove the top layer of the sealant to improve paint adhesion.

Should you paint cinder block basement walls?

Your basement will either have a concrete foundation or cinder block foundation. By painting the walls or foundation, you increase the appeal of the space, but also it improves the moisture control from the wall.

Is it OK to paint basement concrete walls?

I am talking about do not paint your foundation walls like concrete, brick, and block. Remember, most foundation walls allow lots of moisture and humidity into your basement. Many paints are not strong enough to hold back the hydrostatic pressure.

Can I paint over painted basement walls?

Things You’ll Need



Perhaps the simplest way to cover old painted concrete walls is to remove the original paint from the walls and repaint or stain them. Covering painted concrete walls with a new coat of paint or stain is a fairly simple project that many homeowners can handle on their own.

How do you prepare sealed concrete for painting?

The following steps are critical before painting any type of concrete.

  1. Clean the Area. …
  2. Apply an Etching Solution. …
  3. Fill All Cracks. …
  4. Apply Concrete Sealer if You Don’t Want a Painted Surface. …
  5. Thorough Wash and Moisture Test. …
  6. Purchase the Right Paint. …
  7. Apply Two Coats.


Can you paint over water based sealer concrete?

A. You can’t apply paint over an acrylic concrete sealer and expect it to bond for very long. There aren’t any pores in the concrete for the paint to absorb into and stick to the concrete. They have all been filled with the primer, paint, and sealer you have already applied.

How do you prepare a cinder block wall for painting?

How to Paint a Cinderblock Wall

  1. Remove any flaking paint from the wall if it was previously painted. …
  2. Fill in any large cracks with an acrylic caulk. …
  3. Spread a drop cloth on the ground in front of the cinder block wall. …
  4. Paint the entire wall with a thin coat of a concrete sealer or concrete primer.

What kind of paint do you use on cinder block walls?

Cinder blocks require a durable paint to hold up to wear and tear. Latex paint with acrylic will provide the best coverage and the smoothest application for both smooth and split-face cinder blocks.

Can you paint over Drylok?

Can you paint over DRYLOK® Masonry Waterproofer? A. Absolutely. In fact, DRYLOK® makes an ideal base coat.

What paint can go over DRYLOK?

Applying Paint Over DRYLOK



DRYLOK readily accepts latex or acrylic paints once the DRYLOK itself is dry. It can be used as a base coat or primer for other paints, for instance, if you prefer a shade not available in any of the DRYLOK products.

Can I paint with Kilz over DRYLOK?

Yes, you can paint kilz over drylok.

How do you paint on DRYLOK?

Quote from the video:
Quote from Youtube video: Film on the top of the wall. And you can tint this to any color you want so you don't have to do this in white. You can use it for a variety of different surfaces. And areas in your home.

Can you roll on DRYLOK?

If you prefer to use a roller, be sure to back brush the first coat to make sure DRYLOK® penetrates those pores and pinholes. After three hours, the first coat will be dry. Apply coat number two using your choice of a roller, brush, or sprayer.

How do you remove DRYLOK from basement walls?

Use a sander to make tough areas more porous before trying a second coating. Use a sharp putty knife to help break up large swaths of Drylok. Brush on another coating of solvent and let it sit for 45 minutes before attacking the Drylok again with the pressure washer.