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PR1772 is known as a low weight sealant with a mid-level temperature range. As its name currently implies, PR1772 is up to 30 percent lighter than other sealants used for fuselage repairs on aircraft. Because of its use on aircraft, PR1772 is designed to withstand exposure from fluids such as jet fuel and gasoline. The PR1772 compound has a low sag and is easy to apply in its paste form.