4. Press the tape firmly against the surface to ensure full contact between the tape and the substrate.Smooth out any wrinkles, bubbles, or gaps to create a tight seal. In some cases, you might need to apply multiple layers of tape, particularly when sealing larger gaps or joints.

20mm intumescent strip. These strips are usually supplied in rolls or pre-cut lengths, making them easy to transport and handle on site. They can be quickly installed with adhesive or screws, and can easily be replaced if damaged or worn over time.