Fire doors are specialized doors made to retard the spread of fires and provide additional protection. Intumescent Fire and Smoke Seals are designed for use with a fire door and expand upon sensing heat, filling any gaps between the door and the door frame, blocking the spread of smoke to the other side. Intumescent strips are essential to ensure that your fire doors are fully prepared to withstand a fire. Just like fire-rated doors, Intumescent Strip also needs to comply with fire regulations. At BuildWorld, we have a wide range of fire hardware and safety products to ensure personal and property safety. Our fire retardant products come in high quality constructions with economical rates and include Fire and Smoke Seals.