Henry HE787074 5Gallon Elastomulsion Damproofing"HENRY CO" ROOF COATING Size Gal=5 Black Seamless rubberized asphalt membrane, for use in waterproofing or dampproofing concrete and masonry surfaces above and below grade Excellent adhesion to most concrete surfaces such as concrete, brick, stone, wood, or metal. Retains flexibility in wide temperature range Cold applied by trowel, brush, or spray; requires no special equipment such as kettles. Non flammable Coverage: Apply at a rate of 25 sq. ft.