An oxidizer is a type of chemical, which a fuel requires to burn. Durlon® 9000 is for use in process piping and equipment in many industrial applications where resistance to highly aggressive chemicals is required. In addition, the shape of the fillers does not allow wicking, which can cause corrosion on flange surfaces. The 6 inch Class 300 Durlon® 9000 gasket passed the API Standard 6FA Fire Test. The test fixture was subjected to an external flame of 875°C (1607°F) average for 30 minutes. The measured leakage was 1.8 ml/min, where the max allowable limit is 1200ml/sec.