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Specialty Products

PR-1773 Class B Corrosion Inhibitive Access Door Sealant

PR-1773 Class B is a low adhesive, non-chromate corrosion inhibitive sealant. It has a service temperature range from -65°F (-54°C to 250°F (121°C), with intermittent excursions up to 300°F (149°C). The material is designed for use as an effective barrier against the common causes of corrosion on aluminum alloys or between dissimilar metals.

PR-1773 Class B is a two-part, manganese dioxide cured, polysulfide compound. The uncured material is a low sag, thixotropic paste suitable for application by extrusion gun or spatula. It cures at room temperature to form a removable seal to common aircraft substrates.



  • * Below is a partial specification list - for additional information - contact
  • AMS 3284 - Type 1 Class B-1/2
  • AMS 3284 - Type 1 Class B-2
  • BPS 299-947-074 - Type 3 Class B - BELL HELICOPTER
  • CMS-SL-107 - Class B, Grade 1/2 - COMAC
  • CMS-SL-107 - Class B, Grade 2 - COMAC
  • DMS 2410 - B-1/2 - BOEING LONG BEACH
  • DMS 2410 - B-2 - BOEING LONG BEACH