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The Dow Corning product, Q4-2805 is a fluoride infused, silicone channel sealant. It is used primarily as a groove injection sealant in various aviation applications particularly in fuel tanks. It is white in color, tacks almost immediately and is resistant to a wide variety of aviation fuels and oils. Its one part, non-curing formulation makes Q42805 ideal for application in the field on almost every aviation repair and maintenance job.