The Department of Defense, specifically the U.S. Air Force, is seeking proposals for the Small Business Innovation Research (SBIR) topic titled "3000F Oxidizing Extreme Combustion Environment Fiber/Filaments And Rope Seals." The objective is to develop and demonstrate new fibers or filaments, surface treatments, or coatings that can withstand extreme temperatures of over 3000°F for at least one hour, while also being capable of being fabricated into rope seals for use in hypersonic propulsion systems. These rope seals are critical for maintaining the integrity of high-temperature environments in future Air Force hypersonic flight and propulsion systems, where existing materials have proven inadequate. Proposals are due by May 21, 2025, and interested parties can find more information and submit their applications through the provided link: SBIR Topic Link.