Royal Adhesives WS-8020RC B4 Fuel Tank & Fuselage Sealant (AMS-S-8802 / AMS3276)

WS-8020 RC Class B is a rapid cure two componentpolysulfide sealant designed to meet the requirements ofboth AMS-3276 and AMS-8802 fuel tank specifications. Ithas outstanding adhesion to the common aerospacesubstrates as well as excellent sealing characteristics attemperatures ranging from -65°F (-54°C) to 250°F(121°C), including intermittent exposure up to 360°F(182°C).

WS-8020 RC Class B exhibits excellent elastomericproperties and retention after prolonged exposure to jetfuel and aviation gasoline. The uncured product is a lowsag thixotropic paste suitable for application by extrusiongun or spatula.

Key Features and Benefits:

• • • Rapid Curing: Enhances productivity by reducing downtime.
    • Temperature Resilience: Performs effectively across a broad temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent exposure up to 360°F (182°C).
    • Elastomeric Properties: Maintains flexibility and strength after prolonged exposure to fuels and oils.
    • Application Versatility: The uncured sealant is a low-sag, thixotropic paste suitable for application by extrusion gun or spatula.

Applications:

• Surface Preparation: Clean substrates with appropriate cleaning solutions using a lint-free cloth to remove contaminants like dirt, grease, and processing oils. Apply solvent to the cloth to avoid contaminating the solvent supply. Clean small areas at a time and wipe immediately to prevent redeposition. Repeat the process at least three times, using a fresh cloth each time.

• Mixing: Thoroughly mix the two components in the specified ratio (100:12) until achieving a uniform color and consistency.

• Application: Apply the mixed sealant using an extrusion gun or spatula, ensuring even coverage on the prepared surfaces.

• Curing: Allow the sealant to cure at room temperature. The tack-free time is less than 9 hours, with full cure achieved in under 14 hours.

Technical Specifications:

• • • • Color: Dark Gray
      • Consistency: Paste
      • Application Life: Approximately 2 hours
      • Tack-Free Time: Less than 9 hours
      • Cure Time: Less than 14 hours
      • Mixing Ratio: 100:12
      • Shelf Life: 9 months when stored below 80°F (27°C) in the original unopened container
      • Packaging Options: Available in 2.5 oz, 6 oz, pint, quart, and gallon sizes

Specifications:

• AMS-8802
  
• AMS3276