Knauf Acoustical Sealant is white colored, acrylic based sealant which improves sound insulation and acoustical performance when applied in drywall partitions as per Knauf’s Technical Datasheet recommendation. Field of Application: It can be used as a general purpose sealant for compatible joints involving gypsum board, metal, concrete, cement, wood plastics. The most common application is sealing the space between the surface and Knauf UW metal tracks in all types of drywall partitions. It can be used with both Knauf EN- BS and ASTM drywall systems.