PR-1426 has been discontinued. A possible alternative could be P/S 860 Class B.
PR-1426 is a quick repair, aircraft integral fuel tank sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F (135°C). This material is designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas.
PR-1426 is a two-part, dichromate cured polysulfide compound. The uncured material is suitable for application by extrusion gun or brush. This sealant cures at temperatures from 20°F (-7°C) upward to form a resilient sealant. It has excellent adhesion to common aircraft substrates when correctly primed with PR-1426 Adhesion Promoter.
Adhesion Promoter is included with sealant
Technical Data Sheet for PR-1426 (pdf)
|Designation||No. per Case|
|Model 654 Semkit – 6 oz. Cartridge with 3-1/2 fl. oz. of Sealant||24|
PR-1426 came in the following packaged configuration:
- Semkit® package- a complete package assembly that stores, mixes, and applies sealant. Semkit® packages eliminates the labor intensive task of measuring and handling materials, and prevents contamination when opening and closing can kits.
- Model 654 Semkit® with 3-1/2 fl. oz. of sealant in a 6 oz. cartridge
- Other packaging configurations may be available.