Flamemaster CS-3808 Class A1/2 Silicone Sealant (BMS-8-68)

Flamemaster CS-3808 Class A Silicone Sealant is a two-part, chemically cured, room-temperature vulcanizing (RTV) silicone compound specifically designed for demanding aerospace, missile, and electronic applications. This sealant is engineered to provide an exceptional combination of high-temperature performance, long-term stability, and ease of application. The "Class A" designation typically refers to a brushable or flowable consistency, making it suitable for thin coatings, potting, or applications where the sealant needs to spread or self-level. Upon curing, CS-3808 forms a flexible and resilient rubber that exhibits excellent thermal stability, electrical properties, and resistance to sponging and reversion over a wide temperature range, along with good adhesion to a variety of surfaces, often with the use of a primer.

Key Features for Aviation:

• Two-Part System: Consists of a base compound and a curing agent, mixed just prior to application.
  
• Silicone RTV Chemistry: Provides inherent high-temperature stability, flexibility, and good electrical insulating properties.
  
• Rapid Room Temperature Cure: Cures effectively at ambient temperatures, allowing for quicker processing and handling.
  
• High Temperature Performance: Designed to withstand extreme temperatures, often operating effectively from very low (e.g., -65°F / -54°C) to very high temperatures (e.g., up to 475°F / 246°C continuous, with intermittent exposure to higher).
  
• Excellent Stability: Resists degradation, sponging, and reversion (returning to a liquid state) over time and temperature cycling.
  
• Good Electrical Properties: Possesses high dielectric strength and good volume resistivity, making it suitable for electrical insulation applications.
  
• Permanent Adhesion: Forms durable bonds to a wide range of substrates, including metals (aluminum, steel) and often requires a primer (e.g., CS9903) for optimal adhesion.
  
• Fluid Resistance: Offers good resistance to distilled water, salt water, hydraulic fluids (like Skydrol), and jet fuel, making it suitable for aerospace environments.
  
• Class A Consistency: Brushable or pourable, ideal for thin coatings, conformal coatings, or applications where flowability is desired.
  
• Versatile: Can be modified to achieve a range of consistencies and cure properties while retaining core performance.

Typical Aviation Applications:

• Insulating Coating and Thermal Barrier: Used as an insulating coating or thermal barrier material on aircraft and missile components where heat transfer needs to be retarded, protecting sensitive parts from high temperatures.
  
• Electrical Encapsulation and Potting: Ideal for encapsulating and potting electrical components, connectors, and wiring harnesses to protect them from moisture, vibration, thermal cycling, and environmental contaminants.
  
• Sealing Applications in High-Temperature Zones: Used for sealing joints, seams, and fasteners in areas of the aircraft that experience elevated temperatures, such as engine compartments or near exhaust systems.
  
• Gasketing: Can form flexible, high-temperature resistant gaskets for various assemblies.
  
• Missile and Electronic Applications: Its robust performance characteristics extend its use beyond aircraft to missile and other advanced electronic systems requiring high reliability.
  
• Corrosion Protection: Provides a barrier against corrosive elements, extending the life of components.

• 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.