Flamemaster CS 1900 Firewall Sealant – MIL-S-38249 Type I

$144.24

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Flamemaster CS 1900 is a high-performance, flame-resistant aerospace sealant specifically formulated for sealing aircraft firewall structures and protecting against the passage of air, vapor, and flames. This two-component, non-silicone elastomeric compound provides reliable sealing performance in demanding aviation environments where high-temperature resistance and flexibility are essential.

Engineered to remain flexible across a wide operating temperature range of -65°F to 400°F, CS 1900 withstands flash temperatures up to 2,000°F. Its rubber-based epoxy/amine formulation offers excellent adhesion, low sag characteristics, and resistance to thermal stress, making it suitable for sealing firewall joints, seams, and other aircraft structures requiring flame-resistant protection.

CS 1900 cures at room temperature and can be applied using an extrusion gun or spatula. It meets the requirements of MIL-S-38249 Type I for aerospace firewall sealing applications.

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Features & Specifications:

  • Manufacturer: Flamemaster (Chem Seal)
  • Part Number: CS 1900
  • Specification: MIL-S-38249 Type I
  • Product Type: Aircraft Firewall Sealant
  • Formulation: Two-component, non-silicone epoxy/amine
  • Color: Black (mixed)
  • Operating Temperature: -65°F to 400°F (-54°C to 204°C)
  • Flash Temperature Resistance: Up to 2,000°F (1,094°C)
  • Mixing Ratio: 100:2.5 by weight (base to curing agent)
  • Consistency: Low-sag, workable paste
  • Application: Extrusion gun or spatula
  • Cure Type: Room-temperature curing
  • Tack-Free Time: Less than 24 hours at 77°F
  • Shelf Life: At least 12 months from manufacture when stored unopened at or below 80°F
  • Applications: Aircraft firewalls, structural joints, seams, and flame-resistant sealing

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