NobleSeal CIS (Crack Isolation Sheet) from The Noble Co. protects stone tile and thin-set ceramic installations from cracking. It can be used to bridge cracks and control joints, and is good over all common substrates, including Gypsum-based underlayments, The Noble Co. reports. Made from Chlorinated Polyethylene (CPE), NobleSeal CIS will last the life of the tile installation, according to the company. A 5-year labor and materials warranty is also available. NobleSeal CIS is bonded to the substrate using NobleBond 21, a one-part adhesive, or with a latex modified thin-set mortar. Tile is then installed on the CIS using a thin-set. NobleSeal CIS is 1/32 inch thick and comes in 50-foot rolls measuring 2-, 3-, 4-, and 6-feet wide.