PR-1829 Class B is a fast aircraft windshield and canopy sealant. It has a service temperature range from -80 ° F (-62 ° C) to 320 ° F (160 ° C) with intermittent trips up to 420 ° F (216 ° C). This material is designed for internal corner sealing of glass, polycarbonate, acrylic and other aircraft sealing applications. The product contains no organic solvents and does not pierce substrates. Cured sealant shows excellent resistance to UV and weather conditions.

PR-1829 Class B is a two component epoxy cured Permapol® polythioether compound. Uncured material is a low sag, thixotropic putty suitable for application by extrusion gun or spatula. Unlike standard polysulfide windshield sealants, it can cure at low temperatures and is not affected by changes in relative humidity.