How to seal a brick fireplace

Written by constance barker
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How to seal a brick fireplace
Seal brick fireplaces with a water repellent sealer. (Jupiterimages/Photos.com/Getty Images)

A fireplace surrounded by brick adds warmth and a cosy feeling to a room. Brick fireplaces may require sealing to keep moisture absorption to a minimum. Excessive moisture on bricks may damage the stone and result in a crumbling fireplace. Clean the brick surface first to avoid sealing in dirt and grime. After cleaning, use a water sealer appropriate for brick surfaces to seal your fireplace properly.

Skill level:
Moderately Easy

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Things you need

  • Towels
  • Bucket
  • 1 tsp liquid dish soap
  • Stiff-bristle brush
  • Rags
  • Pump sprayer
  • Water sealer

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Instructions

  1. 1

    Lay towels on the floor in front of the fireplace. Mix 1 tsp liquid dish soap into a bucket of water. Wet a stiff bristle brush with the cleaning mixture.

  2. 2

    Scrub the brick with the brush. After washing, wet a rag and wipe it over the brick removing the soap residue. Press towels into the brick to help remove the water. Allow the brick to dry completely overnight.

  3. 3

    Pour a water repellent sealer into a pump sprayer. Pump the sprayer to form pressure.

  4. 4

    Position the nozzle at the top of the fireplace and 3 to 4 inches from the brick. Start spraying the brick, sweeping the nozzle back and forth, working your way down the fireplace. Saturate the brick completely.

  5. 5

    Allow the first coat to dry, approximately one to two hours. Apply a second thin coat to the brick. Allow the second coat to dry completely before using the fireplace.

Tips and warnings

  • Do not add the second coat if you feel the first coat has sufficiently sealed the fireplace.

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