How to seal a brick fireplace

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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.

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.

  • A fireplace surrounded by brick adds warmth and a cosy feeling to a room.
  • After cleaning, use a water sealer appropriate for brick surfaces to seal your fireplace properly.

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.

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

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.

  • Scrub the brick with the brush.
  • Allow the brick to dry completely overnight.

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.

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