PRC Desoto - PR-1425 B-2 Windshield Sealant, 6oz kit PR-1425 Class B is an aircraft windshield and canopy sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F... MSRP: Was: Now: $129.99 Out of stock