Flamemaster CS3201 Class B Integral Fuel Tank & Cabin Sealant AMS-S-7124 Black (Formerly Mil-S-7124 and Mil-S-7502)

NSN 8030-00-839-2099   

CS 3201 Class B was designed for sealing aircraft against the passage of air, liquids, and vapors. If using CS 3201 Class B in a fuel or oil tank, a protective top coating of AMS-S-4383, such as CS 3600, is necessary to ensure maximum service life. This high-performance sealant is engineered to provide excellent adhesion, flexibility, and resistance to common aircraft fluids and environmental conditions. Its Class B designation typically indicates specific application properties such as viscosity or flow rate, making it suitable for a range of sealing tasks in aircraft manufacturing, maintenance, and repair. This compound helps maintain the structural integrity and operational safety of aircraft by providing a dependable barrier against leaks and corrosion.

Key Features for Aviation:

• High-performance sealant specifically designed for aircraft applications.
  
• Provides excellent adhesion to common aircraft substrates like aluminum and composites.
  
• Offers good flexibility to accommodate movement and vibration in aircraft structures.
  
• Resistant to many common aircraft fluids, including fuels and lubricants (always verify specific resistance).
  
• Class B designation indicates specific handling and application characteristics.
  
• Suitable for a variety of sealing tasks in aircraft manufacturing, maintenance, and repair.
  
• Helps prevent leaks and corrosion in critical aircraft areas.

Typical Aviation Applications:

• Sealing access panels and doors.
  
• Sealing around fasteners and rivets.
  
• Sealing faying surfaces to prevent corrosion.
  
• Gap filling and sealing in structural joints.
  
• Sealing components in non-fuel tank areas.
  
• Use in the manufacturing and maintenance of commercial and general aviation aircraft.

• 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.