A handy ten foot, 1 1/2" wide insulation strip with a peel-off, self-stick back, forms a smoke and gas tight seal between fireplace insert and existing masonry. This product makes it easy to get a smoke and gas tight seal when installing the fireplace stove or re-inserting the fireplace stove back into the fireplace after a chimney cleaning. Also for use with fireplace doors. To obtain best stove performance, replace insulation each time insert is removed for cleaning. Length is 10'.