FibaTape Cement Board Tape is analkali-resistant fiberglass mesh tape and should be used for cement applications with dry or thin-set mortar. Self-adhesive tape is made from the same vinyl-coated fabric that is in the face of some cement boards to give the board added strength and crack resistance. Self-adhesive, fiberglass joint tape is ideal for use in the installation of cement backerboard on walls, floors, ceilings, and countertops.