When building brick structures its important to apply a brick sealant and waterproof. This is because, over time, bricks stain and wear down. This wear and tear damages bricks and allows insects and weeds into the structure. Applying a protective coating to bricks prevents dirt and stains from penetrating into the paver, making it easier to clean in the future. A sealant also helps to seal in the joint stabilization sand, helping keep hazardous items from entering into your basement. Mar-flex offers an easy brick sealer solution in the form of SurfiSeal Brick Sealer.