If you’re working with live wires, for example, it’s always best to err on the side of caution and use heat-resistant tape instead.
3. Peel and stick.Butyl sealant tape usually comes with a protective backing to prevent it from sticking to itself during storage and handling. Carefully peel off the backing to expose the adhesive side of the tape. Position the adhesive side of the tape on the surface, and carefully align it with the area to be sealed.