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Tremco Vulkem 116 One-Part, High-Performance Polyurethane Sealant One-Part Grainy Textured Finish Primerless Adhesion on Most Common Construction Surfaces Durable and Flexible Seal Features and Benefits: Tremco Vulkem 116 has demonstrated superior primerless adhesion to porous substrates for 30 years, and is the choice for sealing expansion joints in commercial construction applications. It can be used exterior or interior with adequate ventilation. Vulkem 116 is also suitable for certain water immersion applications.