interior/exterior brick sealer, 1 gal - clear, satin, acrylic sealer for vertical walls - masonry sealer for reducing brick dust & making interior brick walls easy to clean masonrydefender masonrydefender interior/exterior brick sealer is a durable, water-based, clear, acrylic sealer designed to seal interior or exterior brick & masonry walls, giving them a slight satin sheen. this masonry sealer is formulated with a durable acrylic resin that reduces water penetration on exterior walls, and minimizes brick dust on interior walls making brick walls easier to clean and giving them an attractive satin sheen.<br><br> masonrydefender interior/exterior brick sealer can be used on most types of above-grade, vertical, interior or exterior masonry surfaces including: brick, stone, stucco, adobe, and moderately dense substrates. it can be used as both an interior brick sealer, or an exterior brick sealer and provides a slight satin sheen. if cleaning is necessary on exterior surfaces, use masonrydefender all purpose masonry & concrete cleaner.