Door bottom sweeps are designed to seal the gap between the bottom of the door and the threshold (floor) to prevent light, sound, dust, moisture and insects from entering the room. They also aid in insulating a room and providing a simple and inexpensive way to conserve energy and save money on electricity bills. Raptor Supplies offers a variety of Pemko and National Guard Products door bottom sweeps with brush (nylon) & synthetic rubber (EPDM / neoprene / nylon / PVC / vinyl) seals, and wood (hardwood / oakwood) & metal (aluminium / bronze / steel) flanges. These sweeps are available in 3- / 4- / 7- / 8-foot length variants in different finishes and colours for use with metal and wooden doors, and can be mounted on the inside / outside of doors. A broad variety of UL-approved, fire-rated door sweeps is also available for use with fire-rated doors having improper alignment.