Modified bitumen from Home Depot is typically applied using a torch or hot air welder, ensuring proper adhesion to the substrate. The surface must be clean and dry before application. The modified bitumen sheets are rolled out, overlapping edges are heated, and then pressed together to form a seamless waterproof membrane. This process enhances the durability and flexibility of the asphalt, making it suitable for various roofing and paving applications. Proper safety measures should be followed during installation.