Strong and Durable: Made of aluminum, strong and durable, lightweight and compact. After use, the gun body is easy to clean. Convenient to Use: The spring-loaded trigger and control knob allow you to precisely control the flow rate and adjust the spray distance. Avoid foam waste. Copper tips facilitate flow. Corrosion-resistant and wear-resistant, with strong expansion and strong adhesion, it is ideal for insulating and sealing small gaps such as windows and doors in your home. Widely Used: Ideal for filling, sealing and insulating small gaps. No pressure on the wall and pipe, leak-proof. Very suitable for balcony doors, windows, bathtubs, wardrobes, etc. EASY TO USE: Simply screw the can and open the gun and you are ready to go. When you're done with your project but there's still foam left in the can, you can close the gun and leave the can in place. Otherwise, you'll need to remove the foam can and run a can of cleaner through the gun. Just be sure to remove the cleaning can after use.