Flex-Mend - Mending kit 10 sq. ft. (54" x 28") of Flex-Mend along with 20 sq. ft. (108" x 28") of woven polyethylene bottomboard. This combination of materials permits the homeowner to repair small holes,tears and cuts by making patches of Flex-Mend, or to repair larger damaged areas where the original bottomboard is missing using bottom- board replacement material. Then Flex-Mend can be cut into strips and applied as a tape to seal the uncoated bottomboard patch in place. Application instructions are printed on the outside of eachbox.