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A high-grade mastic compound of asphalt and mineral fillers. This material is blended in proportions to assure maximum resistance to weathering while providing ease of application. A soft pliable material that gradually hardens to a durable and water resistant seal. It sets firmly after application, yet retains is pliability over a period of years. For repairing leaks in asphalt, metal, and composition roof surfaces. Used for waterproofing and on flashing where a heavy duty product is required and as an emergency patching compound that provides good water resistance. Covers 12-1/2 sq. ft. pergallon applied 1/8" thick.