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There are lots of sealants out there, but none performs quite like PR1773B2. Polysulfide-based and a non-chromate, PR1773B2 was designed for use as an access door sealant on aircraft. However, PR1773B2 is also perfect for sealing other materials as well, including electrical wires, moisture and dirt. PR1773B2 is especially resistant to jet fuel, gasoline and water. The PR1773B2 paste is perfect for any sealing that needs to be done on an aircraft.