Rutland Products Rutland Fireplace Mortar 10.3 Oz Cartridge (Buff) Buff (tan) colored fireplace mortar Perfect for repairing small chips or cracked firebrick, re-pointing mortar joints between firebricks, and bonding firebricks together Sets as hard and as strong as firebrick after curing Approximate Coverage: 99 feet with 1/8" bead. Rated to 2000F (1090C)