Flamemaster CS 1900 is a two-component, non-silicone, elastomeric firewall sealant designed for aerospace applications. It effectively seals aircraft structures against air, vapor, and flames, making it ideal for fuel tank and fuselage sealing, including repairing integral fuel tanks, cabin pressure sealing, and aerodynamic smoothing.
Flamemaster CS 1900 is a specialized firewall sealant designed for high-temperature resistance and durability in aerospace applications. It operates effectively between -65°F to 400°F (-54°C to 204°C) and can withstand flash temperatures up to 2,000°F (1,094°C). The uncured sealant has a low-sag consistency, making it easy to apply via extrusion gun or spatula. Once cured, it maintains flexibility and strong adhesion, ensuring long-lasting protection in extreme conditions.
Key Features & Specifications:
- Temperature Resistance: Withstands extreme conditions from -65°F to 400°F and flash temperatures up to 2,000°F.
- Application Properties: Low-sag material, suitable for extrusion gun or spatula application.
- Specifications: Meets MIL-S-38249 Type I requirements.
Technical Data:
- Mix Ratio: 100 parts base to 2.5 parts curing agent by weight.
- Application Life: ~1.5 hours at 77°F and 50% relative humidity.
- Tack-Free Time: Less than 24 hours under standard conditions.
- Cure Time: Achieves Shore A hardness of 40 after 48 hours at room temperature.
- Specific Gravity: 1.37 (maximum 1.5).
- Non-Volatile Content: 75%.
Performance Characteristics:
- Flame Resistance: Withstands 15-minute exposure to 2,000°F flame without burn-through; self-extinguishes upon flame removal.
- Thermal Rupture Resistance: Passes 15-minute tests at both 77°F and 400°F with 5 psi pressure, even after flame exposure.
- Low-Temperature Flexibility: Remains flexible without cracking at -65°F.
- Corrosion Resistance: Minimal corrosion (4.3%) after 20 days in 3% saltwater at 140°F.
Application Guidelines:
- Surface Preparation: Ensure surfaces are clean and free from oil, grease, or dirt. Progressive cleaning with appropriate solvents is recommended.
- Mixing Instructions: Mix base and curing agents according to the specified ratio. Avoid thinning with solvents.
- Curing: Standard curing occurs at room temperature; accelerated curing methods are available if required.
Packaging & Storage:
- Packaging Options: Available in injection kits, can kits, bulk packaging, and premixed frozen forms.
- Shelf Life: At least 12 months when stored below 80°F in original, unopened containers.
For aerospace applications requiring high-temperature resistance, CS 1900 is a trusted solution for firewall and fuel tank sealing.
