Sauereisen Fib-R-Thane No. 88P is used as a flexible expansion joint for concrete, brick and tile floors; for sealing joints of ducts and conduits; and for general caulking and sealing where permanent flexibility and adhesion are required.

Fib-R-Thane is an asphalt-modified urethane material with fiber reinforcement. No. 88P offers resistance to mineral acids and alkalies, but is not resistant to oils, kerosene or petroleum solvents.