PPG Aerospace PR-1440 B-1/2 AMS-S-8802 / MIL-S-8802 Type 2 Class B1/2 Fuel Tank Sealant

The PPG PR-1440 Class B is a high-solids, manganese dioxide-cured polysulfide compound engineered to function as the primary fillet sealant for integral fuel tank structures. As a Type 2, Class B compound, it provides the robust, fuel-resistant barrier required by major military and commercial aerospace platforms, ensuring structural integrity and leak prevention across a challenging operational spectrum. This material is formulated as a thixotropic, non-sag paste (Class B), designed to be applied in substantial fillets and beads without slumping, even on vertical or overhead surfaces. It delivers the necessary elongation and strength to withstand the differential expansion and contraction of airframe structures.

The PR-1440 Class B sealant is indispensable for structural sealing applications:

• Fillet Sealing: Primarily used to create triangular fillet beads along seams, joint overlaps, and interfaces inside the fuel tank, forming the critical primary barrier against leaks.
  
• Structural Gaps and Voids: Ideal for filling larger structural gaps and voids where a thicker, non-flowing material is necessary to maintain a seal during cure.
  
• MRO and Production: Available in various work-life versions (e.g., B-2 for typical line work or B-4 for complex, large-area sealing) to optimize workflow and reduce material waste.

Interchangeable with Flamemaster: CS-3204B1/2

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization). Returns without prior notice or written authorization will not be accepted.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.