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.
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