Flamemaster CS-9903 Primer (MIL-P-47215 / MMS-K328)

Flamemaster CS-9903 Primer is a single-component, solvent-based adhesion promoter specifically engineered to enhance the bond strength and durability of various silicone-based sealants and coatings, particularly Flamemaster CS-3808. It is designed to chemically modify the substrate surface, creating an optimal interface for the silicone to adhere to, especially on difficult-to-bond materials. This primer is a crucial step in achieving a reliable and long-lasting seal in demanding aerospace, missile, and electronic applications where high performance and environmental resistance are paramount. It is typically applied as a thin, uniform coat and allowed to dry before the application of the silicone sealant.

Key Features for Aviation:

• Single-Component: Ready to use directly from the container, requiring no mixing.
  Solvent-Based: Contains volatile solvents that evaporate after application, leaving behind the active adhesion-promoting agents.
  
• Adhesion Promoter: Specifically formulated to significantly improve the adhesion of silicone sealants (such as Flamemaster CS-3808) to various substrates.
  
• Versatile Substrate Compatibility: Effective on a wide range of materials commonly found in aerospace, including metals (aluminum, stainless steel, titanium), glass, and some plastics.
  
• Enhanced Durability: Improves the overall durability and environmental resistance of the silicone bond, particularly against moisture, temperature cycling, and fluid exposure.
  
• Fast Drying: Typically dries quickly, allowing for efficient processing and subsequent sealant application.
  
• Transparent/Clear: Usually appears colorless or slightly translucent, minimizing visual impact on the substrate.
  
• Essential for Optimal Performance: For many silicone aerospace applications, a primer like CS-9903 is critical to achieve the specified bond strength and long-term performance.

Typical Aviation Applications:

• Preparation for Silicone Sealant Application: The primary use is to prepare surfaces before applying silicone sealants like Flamemaster CS-3808. This ensures maximum adhesion and prevents delamination, particularly in:
  
• High-Temperature Sealing: Critical for sealing joints and components in engine bays, exhaust areas, or other hot zones where CS-3808 is used.
  
• Electrical Potting and Encapsulation: Enhances adhesion when potting or encapsulating sensitive electronic components and wiring with silicone for protection against moisture, vibration, and thermal stress.
  
• Environmental Sealing: Improves the bond of silicone seals on access panels, fairings, and other aircraft structures exposed to environmental elements.
  
• Bonding to Difficult Substrates: Particularly important when bonding silicone to typically challenging surfaces like certain metals (e.g., anodized aluminum, stainless steel) or glass.
  
• Repair and Overhaul: Used during MRO (Maintenance, Repair, and Overhaul) activities to ensure new silicone sealant applications achieve optimal bond strength on previously exposed or repaired surfaces.
  
• Missile and Electronic Assembly: Crucial for ensuring the integrity of silicone bonds in missile systems and other high-performance electronic assemblies.

• 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 and damage claims must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization - RMA). Returns without prior notice or written authorization will not be accepted. We strongly recommend inspecting the product upon delivery; many products require special storage conditions for which we are not responsible once they arrive to the client's facility. Please review the product's SDS for proper storage and handling.
• 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.

At Aircraft Shop Supply, we are committed to shipping the highest quality and freshest product possible. To ensure efficient stock rotation and meet aviation industry standards, our inventory management is governed by the following policy:

1. Scope of Application
All Sales Channels: This policy applies to all orders processed by Aircraft Shop Supply, including but not limited to: website purchases, direct email orders, formal Purchase Orders (POs), phone orders, and contract agreements.

2. Inventory Management (FIFO)
All products with an expiration date are managed and shipped on a strict "First In – First Out" (FIFO) basis.

3. Minimum Shipping Margin
Standard Guarantee: We will not ship any products with fewer than 30 days of use remaining (days before expiration), unless previously coordinated and agreed upon with the customer.

No Automatic Guarantees: Outside of this 30-day minimum margin, Aircraft Shop Supply does not make any automatic guarantee as to the specific length of time remaining on any shelf-life item for standard orders.

4. Special Customer Requirements
We understand that certain projects, maintenance schedules, or regulatory standards require strict specifications. If your order has specific shelf-life requirements, please proceed as follows:

How to Request: If you require a specific Date of Manufacture (DOM), Date of Expiration (DOE), or a specific minimum shelf-life percentage (%), you must clearly state this requirement:

In the Comments/Notes section when placing an online order.

Explicitly written on your Purchase Order (PO) or quote request email for offline orders.

Validation Process: Once your requirement is received:

We will ship your order if the available stock matches your specifications.

If we do not have the exact batch, we will contact you prior to shipping with the shelf-life percentage (%) or dates we have available for your acceptance.

5. Limitation of Liability and Validity of Information
To ensure transparency and manage expectations, the following terms and conditions apply:

Time-Limited Validity: Any information provided by our team regarding the remaining shelf-life percentage (%) is valid only at the exact time the inquiry is made. Due to high inventory turnover, availability is subject to change without prior notice.

Informational Purposes Only: Shelf-life data provided by Aircraft Shop Supply is strictly for informational purposes and reflects the availability at the moment of inquiry. It does not constitute a batch reservation or a product warranty.

Supply Chain Liability Exclusion: Aircraft Shop Supply is not responsible for the time elapsed or any product expiration that occurs after the order has been prepared and packed. This includes, but is not limited to: the time between order placement, carrier transit times, intermediary storage, customs delays, and final delivery to the end user. It is the customer's responsibility to account for these logistical lead times within their planning.