PR-1771® Class B Corrosion Inhibitive Sealant, Chromate-Free, Low Density

PPG PR-1771 Class B sealant is a non-chromate* low density corrosion inhibitive sealant with a service range from -54°C to 121°C with short excursions up to 135°C. It is designed for aircraft fuselage sealing applications where a flexible elastomeric seal is needed. This two-part manganese dioxide cured polysulfide compound is a low sag paste applied by extrusion gun or spatula.

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Product Details

PPG PR-1771 Class B is a non-chromate, low density, corrosion inhibitive sealant. It has a service temperature of -54°C (-65°F) to 121°C (250°F), with intermittent excursions up to 135°C (275°F). It is designed for aircraft fuselage sealing applications, such as exterior butt joints and aerodynamic smoothing, where a flexible elastomeric seal is required to prevent intrusion of moisture and provide protection from the common causes of corrosion. It provides a weight saving of as much as 40 percent over traditional sealants used for these purposes.

PR-1771 Class B is a two-part, manganese dioxide cured, PPG PERMAPOL® P-5* modified polysulfide. The uncured material is a low sag paste suitable for application by extrusion gun or spatula. The cured material is resistant to aircraft fuels, petroleum based oils and deterioration by intermittent exposure to diphosphate ester hydraulic fluids.

*Chromium is not intentionally added in the formulation of this product. PPG’s “chrome-free” statement is based on our knowledge of the product formulation.