Lead Flashing Full Reel Code 5 is used to create a waterproof seal on roofing projects. It provides a long-term watertight option that can last three times longer than man made alternatives. It is quick and easy to install and doesn’t require any adhesive or fixing materials. Code 3 Lead Flashing is the thinnest lead roll and is suitable for use on abutment soakers and is easy to work with due to it’s low melting point.