How to Paint a Brick Fireplace With Clear Sealer

Sealing a brick fireplace helps protect against mortar breakdown and moisture. It also makes the surface of the brick easier to clean. There are two types of clear sealers for masonry — film-forming and penetrating. Penetrating sealer, which soaks into the brick, is a better choice because many brands have been heat tested and are fire resistant. Many silicone-based films, on the other hand, can melt, wear off or ignite when close to a heat source for a prolonged length of time. Always start with a squeaky-clean fireplace before sealing; clean all dirt and soot from the bricks and have your chimney professionally cleaned.

Sealing brick prevents breakdown.

Step 1

Put on safety goggles. Open the windows nearest the fireplace to provide ventilation.

Step 2

Use a shop vac to remove residual dust, dirt or debris from the bricks, making sure to vacuum the mortar well.

Step 3

Place a can of sealer into a hand-spraying unit, following the manufacturer’s directions for use.

Step 4

Apply the sealer to the brick using even spray strokes across the entire brick fireplace.

Step 5

Allow the sealer to soak into the brick and dry, as directed by the manufacturer.

Step 6

Apply a second coat, if desired.