FLEXIBLE Pyrogel XTE Aerogel pipe insulation products aerogel blanket insulation is designed to provide exceptional passive fire protection and superior thermal performance in a thin, lightweight format. Tested to the most stringent fire-protection standards, ***delivers hydrocarbon pool-fire protection for up to 4 hours, and jet fire protection up to 2 hours. It can also be used to meet the requirements of API 521 for the sizing of pressure relief systems.