Flamemaster CS-3213 Class A Gray MIL-PRF-81733 Type I, CL 1, GR A Spec Corrosion Inhibitive Fuel Resistant Sealant

NSN 8030-00-008-7196    

CS 3213 Class A is a two-part, manganese dioxide cured polysulfide sealant specifically formulated as a corrosion inhibitive sealant for aerospace applications. This sealant is designed to provide robust protection against corrosion while simultaneously delivering excellent sealing capabilities. The "Class A" designation indicates a brushable or flowable consistency, making it ideal for thin coatings, faying surface applications, or where the sealant needs to fill intricate spaces. Upon curing at room temperature, CS 3213 Class A forms a tough, flexible, and resilient rubber that maintains its integrity under exposure to aviation fuels, lubricants, hydraulic fluids, and environmental elements, providing long-lasting corrosion prevention and leak protection.

Key Features for Aviation:

• Two-Part System: Consists of a base compound and an accelerator, mixed just prior to application.
  
• Polysulfide Chemistry: Provides the fundamental excellent resistance to a wide range of aviation fuels and other aircraft fluids.
  
• Corrosion Inhibitive: Incorporates active corrosion inhibitors to prevent degradation of metal surfaces, especially in the presence of moisture and dissimilar metals.
  
• Manganese Dioxide Cure: A common curing agent for polysulfide sealants, contributing to robust and durable properties.
  
• Class A Consistency: Brushable or flowable, making it ideal for application by brush, roller, or spray (if compatible with equipment) for faying surfaces, intricate areas, or thin coatings.
  
• Excellent Adhesion: Forms strong, durable bonds to typical aircraft substrates, including aluminum, titanium, stainless steel, and composite materials, even on clad aluminum.
  
• Superior Fuel and Fluid Resistance: Highly resistant to aviation jet fuels (JP-4, JP-5, JP-8, Jet A/B), hydraulic fluids (e.g., Skydrol), and engine oils.
  Wide Service Temperature Range: Maintains flexibility, sealing properties, and corrosion inhibition across the typical operating temperatures of aircraft.
  
• Flexibility and Resilience: Cures to a flexible, rubbery seal that can withstand aircraft vibrations, thermal cycling, and structural movement without cracking or delamination.
  
• Good Work Life (Pot Life): Provides sufficient time for application before curing, depending on the specific "A" class variant (e.g., A-1/2, A-2, A-4, where the number indicates the pot life in hours).

Typical Aviation Applications:

• Faying Surface Sealing: Applied between mating surfaces of structural components to prevent corrosion and provide a seal against moisture and fluid ingress. This is a primary application.
  
• Fuel Tank Sealing (Internal): Used for sealing internal fuel tank structures, particularly where a brushable product is needed to cover complex geometries or fill small gaps while providing corrosion inhibition.
  
• Fastener Sealing: Applied around rivets, bolts, and other fasteners in corrosion-prone areas to prevent fluid penetration and inhibit corrosion.
  
• Corrosion-Prone Areas: Used in various compartments and structures susceptible to corrosion, such as bilge areas, landing gear bays, and other hidden areas exposed to environmental elements.
  
• Filleting and Void Filling (Thin Applications): For creating thin fillets or filling small voids where corrosion protection is needed.
  
• Repair Applications: An excellent choice for both production and field repairs requiring both sealing and corrosion inhibition.

Equivalent to: PPG PS870

• 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.