Rutland Products 1111 Fireplace Insert Insulation Fiberglass, 1-1/2-Inch by 10-Feet, 1-1/2" x 10', Yellow

This 10' by 1-1/2" insulation strip with a peel off, self-adhesive backing is ideal for forming a smoke and gas tight seal between a fireplace insert and existing masonry. For the best performance, replace insulation every time the insert is removed for cleaning.