Tremco Vulkem 116 is a one-part, moisture-curing, gun-grade polyurethane sealant. It is durable, flexible, and offers excellent performance in dynamic joints. Vulkem 116 is an excellent general-purpose sealant designed for use on poured and precast concrete, masonry work, window and door perimeters, and similar types of construction joints. Vulkem 116 has a 30-year history of delivering superior primerless adhesion to porous substrates, which makes it the choice for sealing expansion joints in commercial construction applications. It is also suitable for certain water immersion applications and is rated for 25 percent movement capability. Substrates must be properly cleaned before sealant is applied for maximum performance. Vulkem 116 is approved for exterior use only.