PPG Aerospace PR-1782 Class A - AIMS 04-05-001/  AIMS 04-05-12 Spec Low Density Fuel Tank Sealant 

The PPG PR-1782 Class A is a two-part, manganese dioxide-cured polysulfide compound engineered to address one of aviation's most critical design constraints: weight. This low-density formulation achieves a significant weight reduction (up to 30%) compared to standard sealants, allowing engineers to maximize aircraft payload and fuel efficiency without compromising safety or fluid resistance. As a Class A sealant, it delivers a precise, low-viscosity application ideal for penetration and coverage, making it the superior choice for high-integrity brush sealing.

The PR-1782 Class A is indispensable for both MRO and OEM projects where weight is monetized:

• Fuel System Overcoating: The gold standard for brush-sealing fasteners and rivets within integral fuel tanks, preventing micro-leaks and aggressively inhibiting crevice corrosion.
  
• Pressurized Fuselage Seams: Used to seal internal seams and joints in the airframe, providing both a pressure seal and corrosion protection with a minimum weight penalty.
  
• Advanced Airframe Assembly: Preferred in the assembly of composite and metallic structures where low-density materials are specified to meet stringent weight targets.

• 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.