QTY3 Polymat 777 Fabric Liner Speaker Box Carpet Upholstery Spray Glue Adhesive. Fast drying, high tack glue. Heavy duty glue, great for gluing a wide range of materials (carpeting, foams, paper, cardboard, felt , cloth) to metals, wood and hardboard.. Ideal for carpeting speaker boxes and custom amp racks, trunk liners,dash, trucks, boats, RV... and many other projects.