PR-1775 Class B Non-Chromate Corrosion Inhibitive Sealant

PPG PR-1775 Class B sealant is a non-chromate* corrosion inhibitive product with a service range from -65°F to 250°F with short excursions up to 360°F. It acts as an effective barrier against corrosion on aluminum alloys. This two-part manganese dioxide cured PERMAPOL® P-5 polysulfide compound is a low sag paste applied by extrusion gun or spatula.

Discover the Future of Flight

Have questions or need support for your aerospace project? Contact PPG’s aerospace team today for guidance and tailored solutions.

Product Details

PPG PR-1775 Class B is a non-chromate, corrosion inhibitive sealant. It has a service temperature range from -65 °F (-54 °C) to 250 °F (121 °C), with short term recurring exposures (approximately 6 hours) to 360 °F (182 °C). This material acts as an effective barrier against the common causes of corrosion on aluminum alloys or between dissimilar metals. The cured sealant maintains excellent elastomeric properties after exposure to both jet fuel and aviation gas.

PR-1775 Class B is a two-part, manganese dioxide cured, PPG Permapol P-5 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 resilient sealant having excellent adhesion to common aircraft substrates.

*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.