Our most durable construction adhesive, this Ultimate formula is tough, versatile and 100% waterproof. It even works under water. It's paintable, easy to dispense, and holds immediately for an instant grab. It bonds subfloor, decks, bath surrounds, granite, marble, brick, metal, and more! DIRECTIONS: TO OPEN: 1) Unscrew and remove nozzle from top of cartridge. 2) Set nozzle aside. Cut hard plastic tip of cartridge above the threads. 3) Replace nozzle. TO USE: All surfaces should be clean and free of dirt, grease and oil. Best if used above 40°F. 1) Cur nozzle at 45° angle to desired bead size. 2) Insert into cartridge gun. 3) Apply adhesive to one surface in a zig-zag pattern or inside perimeter of the object. Be careful of squeeze-out. When working on rough, uneven surfaces, use enough adhesive to fill gaps. 4) Within 10 minutes, press surfaces firmly together. NOTE: Heavy items may require temporary support. Use in conjunction with mechanical fasteners when hanging large mirrors. STORAGE: Gorilla Heavy Duty Construction Adhesive Ultimate is best if stored in a cool, dry location with the nozzle attached filled with adhesive. The left over adhesive in the nozzle acts as a seal for the adhesive in the cartridge. To re-use product, remove nozzle and remove the cured adhesive from the tip. Do not freeze. STORE AWAY FROM CHILDREN AND ANIMALS.