PyroProof Paint - 1 Gallon Details  PyroProof protects most building materials from the ravages of fire. A gallon of PyroProof should roughly cover an average size room. Price: $348.95   PyroProof Paint - 1 Quart Details  PyroProof protects most building materials from the ravages of fire. A quart of PyroProof should be enough to cover both sides of a large door. Price: $98.95