Form: This specification covers a one-part@ high temperature resistant silicone sealing compound supplied in caulking cartridges. Application: This product is used primarily for sealing aircraft firewall structures against passage of air and vapors. The cured compound shall remain an effective sealant at all temperatures between ?65 and +400 ??(?54 to +204 ?? and shall be able to withstand a flash temperature of 2000 ??(1093 ??.