DLSN is designed for sealing metals and masonry surfaces without the need or requirement of a primer. It effectively blocks the infiltration of gases, dust and other contaminantsand the exfiltration of conditioned air. DLSN is a gray, single-component material that is non-drying and permanently flexible. The DLSN in the 5 gallon & 52 gallon containers is a pumpable sealant and is ideal for use in automated injection systems.