How To Seal Brick Walls  5/5 (10)

This post was most recently updated on January 15th, 2024

 How To Seal Brick Walls 2024

Concrete Sealer Review continues to be a dedicated resource for concrete and brick paver sealer professional tips and advice since 1993. Here we have an updated tutorial on how to seal brick walls. If you have sealed brick walls or have any questions, feel free to leave us a comment below.

Brick can come in a variety of forms and be used in many applications of construction. Whether a form of brick is used in house construction be it a retaining wall, chimney, pillars, the house itself, etc., it should be sealed to lock out moisture. Penetrating moisture can deteriorate the brick making it brittle. It can also lead to unsightly problems like efflorescence, fading, discoloration, mold, mildew, or algae. Sealing the brick with a quality brick sealer will provide a protective coat of armor against these contaminants and help to prolong the longevity of the brick.

Prior to sealing brick of any type the surface first needs to be cleaned. Use a quality brick cleaner to break up the dirt and grime. Using a pressure washer, clean the area of the bricks including the mortar joints to remove discoloring dirt, mold, mildew, and grime. If the bricks are suffering from salt leakage be sure to use efflorescence cleaner. If you do not have access to a pressure washer, use brick cleaner and warm water and scrub the brick with a stiff brush. After cleaning allow the brick to dry for a day or two.

Tape off any edges and use plastic to protect areas you do not want to get brick sealer on. How to seal brick depends on the method you choose. A brick sealer can be applied using a brush, roller, or sprayer. Apply the brick sealer according to the directions on the label. The amount of sealer you need to apply will depend on the porosity of the brick. Apply enough sealer to be absorbed into the surface. Be sure to seal the joints as well. Back brush or wipe away any excess runs, drips, or puddles of sealer.

If suggested and needed, apply two coats of brick sealer according to the application instructions on the label. Allow the proper amount of dry time between coats going by the manufacturer’s suggestions.  Seal brick to bring out the natural beauty and/or to protect the brick from moisture. This will help ensure long-lasting beauty and the integrity of the brick down the road. Moisture can do a lot more damage to brick than most people realize. Protect your investment by locking out moisture with a quality brick sealer.

Best Sealer for Brick Walls Video

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6 months ago

I have a recycled exterior brick bungalow that is in good condition – no cracking, mold etc. I think it was sealed decades ago and i would like to give it a new shine. Can i spray a concrete sealant non gloss to give it that new restored shiny look ? Many thanks

2 years ago

I have exposed a brick wall in my kitchen. This home dates to 1833, and I would like to know what brick sealer I should use? I know I need to use a wire brush to clean, and then it seems I need to use water, mild detergent and salt to clean…Is this correct?
So 2 questions? What should I use to clean the wall, and what sealant should I use?

3 years ago

Can you recolor before resealing?

4 years ago

Which it is the most successful brand of a brick sealer? Thank you.

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