DAPCO® 18-4F BMS 5-63 Type 1 B4 Spec Silicone Firewall Sealant – Pint Kit
DAPCO 18-4F by DAPCO is a professional-grade silicone firewall sealant available in Pint Kit format. It is designed for use on Firewall, Bulkheads, Engine Compartment Metal surfaces, delivering long-lasting adhesion, flexibility, and environmental resistance across a wide range of industrial, commercial, and specialized applications. Red in color, this product is trusted by maintenance professionals, OEM manufacturers, and engineers worldwide who demand consistent, specification-grade silicone performance in every application.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 12550098 |
| Brand | DAPCO |
| Product / Model Name | DAPCO 18-4F |
| Color | Red |
| Package Size | Pint Kit |
| Product Type | Silicone Firewall Sealant |
| Specification | BMS 5-63 Type 1 B4 |
| Compatible Substrates | Firewall, Bulkheads, Engine Compartment Metal |
Technical Information
DAPCO 18-4F Pint Kit is a two-part, high-temperature silicone firewall sealant meeting Boeing Material Specification BMS 5-63 Type 1 B4 for sealing aircraft firewalls, fire zone penetrations, and engine compartment bulkheads. The pint kit provides a larger quantity than the mini pint for multi-aircraft maintenance programs or aircraft with extensive firewall sealing requirements. The B4 working life class provides adequate application time for complex sealing sequences, and the cured silicone rubber maintains seal integrity under continuous high-temperature service and post-fire thermal shock conditions critical for aircraft fire zone compliance.
Why Choose DAPCO 18-4F?
- BMS 5-63 Type 1 B4 Approved — Boeing specification-compliant for commercial and military aircraft
- Pint Kit — Larger Volume — More material for multi-aircraft programs or extensive firewall sealing
- Fire Zone Rated — Maintains seal integrity under post-fire thermal shock conditions
- Two-Part System — Factory-formulated for precise mix ratio and consistent cure quality
- Red Fire Zone ID — Immediate visual identification for firewall inspection compliance
Frequently Asked Questions
Q: What is DAPCO 18-4F Pint Kit used for?
A: DAPCO 18-4F Pint Kit is used for sealing aircraft firewalls, fire zone penetrations, and engine compartment bulkheads on commercial and military aircraft where Boeing BMS 5-63 Type 1 B4 specification compliance is required.
Q: What is the MPN for DAPCO 18-4F Pint Kit?
A: The Manufacturer Part Number (MPN) is 12550098.
Q: What is the difference between DAPCO 18-4F Mini Pint Kit (MPN 12550132) and Pint Kit (MPN 12550098)?
A: Both contain the same BMS 5-63 Type 1 B4 compliant firewall sealant. The mini pint is for single-aircraft tasks requiring precise quantity control, while the pint kit provides more material for larger firewall sealing jobs or multi-aircraft maintenance programs.
Q: What specification does DAPCO 18-4F Pint Kit meet?
A: DAPCO 18-4F meets Boeing Material Specification BMS 5-63 Type 1 B4, covering high-temperature silicone sealants for aircraft fire zone and firewall sealing.
Q: How should DAPCO 18-4F be mixed?
A: DAPCO 18-4F is a two-part system requiring mixing at the specified ratio before application. Consult the current DAPCO 18-4F Technical Data Sheet for exact mix ratio, mixing procedure, and working life data.
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