The M-D Vinyl and Premium Rubber U-Cinch Interior Under Door Seal features an adjustable rubber seal to block light and sound at the bottom of your interior doors. There are so many application options with this door seal intended for interior doors. Cinch products are easy to install since they do not require hardware and simply slide onto the door. A compression fit secures the Under Door Seal to the bottom of the door. Before installation, cut to the desired length using a hacksaw and scissors.