DAPCO® 18-4F BMS 5-63 Type 1 B4 Spec Silicone Firewall Sealant – 200 mL (Mini Pint) Kit
DAPCO 18-4F by DAPCO is a professional-grade silicone firewall sealant available in 200 mL Mini 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) | 12550132 |
| Brand | DAPCO |
| Product / Model Name | DAPCO 18-4F |
| Color | Red |
| Package Size | 200 mL Mini 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 is a two-part, high-temperature silicone firewall sealant meeting Boeing Material Specification BMS 5-63 Type 1 B4, engineered for sealing aircraft firewalls, fire zone penetrations, and engine compartment bulkhead joints on commercial and military aircraft. The B4 working life class provides adequate application time for complex firewall sealing operations, and the cured silicone rubber maintains its sealing integrity under continuous high-temperature exposure and post-fire thermal shock conditions. The mini pint kit format is appropriate for single-aircraft firewall sealing tasks requiring precise material quantity control.
Why Choose DAPCO 18-4F?
- ✅ BMS 5-63 Type 1 B4 Approved — Boeing specification-compliant for commercial and military aircraft
- ✅ 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 Color Fire Zone ID — Immediate visual identification for firewall inspection compliance
- ✅ Mini Pint Kit Format — Right quantity for single aircraft firewall sealing operations
Frequently Asked Questions
Q: What is DAPCO 18-4F firewall sealant used for?
A: DAPCO 18-4F is a two-part silicone firewall sealant 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 200 mL Mini Pint Kit?
A: The Manufacturer Part Number (MPN) is 12550132.
Q: What specification does DAPCO 18-4F meet?
A: DAPCO 18-4F meets Boeing Material Specification BMS 5-63 Type 1 B4, which covers high-temperature silicone sealants for aircraft fire zone and firewall sealing applications.
Q: Why is firewall sealant red?
A: Red coloration in firewall and fire zone sealants is an industry convention to provide immediate visual identification during inspection, distinguishing fire zone sealing compounds from other sealants.
Q: What is the working life class of DAPCO 18-4F B4?
A: The B4 designation refers to the working life class of the sealant within BMS 5-63 Type 1. Refer to the current DAPCO 18-4F Technical Data Sheet for exact working life and cure time data.
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