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If you need access door sealant, than try using PR1772B2, which is designed exactly for that purpose. A low adhesion sealant, PR1772B2 can also be used as a material in form-in-place gaskets. PR1772B2 also has anti-corrosive properties, which means it can form durable seals between aluminum and other kinds of metal. Because of its resistance to high temperatures, PR1772B2 is perfect to use on all surfaces of an aircraft today.