Foam closure strips, also known as foam closure tapes or foam closure strips, are a type of sealing material used in construction, particularly in roofing applications. They are designed to seal the gaps between roofing panels, providing weatherproofing and preventing the ingress of moisture, dust, and pests into the building's interior. These closure strips are often made from foam materials, such as polyethylene or polyurethane, which offer flexibility and excellent sealing properties.
Butyl tape is a type of versatile adhesive sealing tape known for its excellent sealing and bonding properties. It is composed of a synthetic rubber called butyl, which is a copolymer of isobutylene and isoprene. The tape is usually black or gray and has a sticky, tacky surface on both sides