Flamemaster CS-247 Class B1/2 Aircraft Windshield Sealant (AMS3333 Type II)

The Flamemaster CS-247 Class B1/2 is a highly specialized, two-part, polysulfide sealant engineered explicitly for sealing transparent plastic windows and windshields in aerospace applications. Its formulation is non-crazing and non-fogging, meeting the stringent requirements of AMS3333 Type II, which is critical for maintaining optical clarity and structural integrity around sensitive acrylic and polycarbonate materials.

Typical Aviation Applications:

The CS-247 Class B1/2 is the preferred sealant for critical transparency sealing tasks:

• Windshield and Window Filleting: Used to create the primary exterior fillet seal around cockpit windshields, passenger windows, and canopies (acrylic or polycarbonate).
  

• Structural Sealing: Forms a resilient barrier between the frame and the transparent plastic, absorbing structural stress and thermal expansion without inducing crazing or cracking.
  

• Fast-Turnaround MRO: The rapid 30-minute work life allows maintenance teams to complete sealing operations and proceed to the next stage of repair or inspection quickly.

• 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.