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PR1773 is a corrosion inhibitive sealant with lower than standard adhesion properties. It is primarily used in the manufacture of access doors for airplanes. The seal it creates is removable, and is made of a low sag, thixotropic paste. Application is best done with a spatula or extrusion gun. PR1773 is composed of non-chromate, corrosion resistant manganese dioxide. PR1773 is effective in temperate up to 120 degrees Celsius and occasional exposure much higher temperatures.