The Everbuild Everflex AC50 Acoustic Sealant and Adhesive is a high-strength, permanently flexible sealant and adhesive designed for sealing and bonding plasterboard and other kraft-lined insulation boards to common substrates. It offers a high grab, adheres to most surfaces, and is mould resistant and non-flammable. Once cured, it can be overpainted and is easy to clean. The AC50 is formulated to create an acoustic and intumescent barrier, effectively sealing gaps in plasterboard walls, floors, and ceilings in dry lining applications. It also functions as an adhesive, bonding plasterboard to plasterboard, wood, metal studding, and directly to block work, making it suitable for most kraft-lined insulation boards.