AS159 FAA-PMA Red Silicone Adhesive Sealant – 10.3 oz Cartridge for Aircraft Maintenance

Aerospace Sealants AS159 Red Silicone Adhesive Sealant is an FAA Parts Manufacturer Approval (PMA) qualified silicone sealant designed for aircraft maintenance and repair operations requiring high-temperature, durable silicone sealing performance. The distinctive red color provides easy identification and visual inspection of sealant coverage, making it the preferred choice for applications where clear confirmation of complete sealing is important.

AS159 cures to a tough, flexible silicone elastomer that maintains its sealing and adhesive properties over an extremely wide temperature range, far exceeding the service range of polysulfide-based sealants. This makes it suitable for use in high-temperature zones including engine nacelles, exhaust areas, firewall applications, and other thermally demanding aircraft locations where standard polysulfide sealants would degrade.

The 10.3 oz cartridge format is compatible with standard manual and pneumatic cartridge guns, enabling controlled, precise sealant application to joints, gasket surfaces, and bonding areas on aircraft. The cartridge delivery system ensures consistent bead size and minimizes material waste compared to bulk sealant application methods.

Technical Information

AS159 is based on a one-component, moisture-cure silicone rubber chemistry that cures at room temperature upon exposure to atmospheric moisture, forming a fully cross-linked silicone elastomer network. The cured material provides excellent adhesion to metal, glass, and composite substrates without requiring a separate adhesion promoter in most applications, simplifying the maintenance process for certified technicians.

The red-pigmented silicone formulation maintains its color, flexibility, and adhesion after extended exposure to high temperatures, UV radiation, ozone, and aerospace fluids including engine oils and cleaning agents. Its high-temperature stability — typically rated to 260°C or higher depending on application — makes it suitable for sealing and gasketing applications in thermally loaded aircraft zones where conventional sealants fail prematurely.

FAA-PMA approval requires manufacture to consistent quality standards with full material traceability, ensuring every cartridge meets the AS159 performance specification. The PMA designation allows AS159 to be used as an approved replacement material on type-certificated aircraft when applied according to the applicable approved maintenance data, providing regulatory compliance for certified maintenance facilities.

Why Choose AS159 Red Silicone Sealant?

• ✅ FAA-PMA Approved — Regulatory compliant for certificated aircraft maintenance
• ✅ High-Temperature Performance — Suitable for engine nacelle and firewall applications
• ✅ Red Color — Easy visual inspection and coverage confirmation
• ✅ Cartridge Format — Precise, controlled application with standard guns
• ✅ Wide Substrate Compatibility — Metal, composite, glass, rubber

Applications and Compatible Aircraft

AS159 is used for engine compartment sealing, firewall joints, exhaust area gasketing, high-temperature structural bonding, and general aircraft maintenance sealing on commercial, business, and military aircraft where FAA-PMA approved high-temperature silicone sealants are required.

Frequently Asked Questions

Q: What makes AS159 a ‘high-temperature’ sealant?
A: AS159 is based on silicone rubber chemistry that retains its flexibility, adhesion, and sealing properties at temperatures far higher than polysulfide or polyurethane sealants. This makes it the right choice for engine compartment, firewall, and exhaust area applications on aircraft.

Q: Is AS159 FAA approved for use on aircraft?
A: Yes. AS159 carries FAA Parts Manufacturer Approval (PMA), making it an approved replacement material for use on FAA-certificated aircraft when applied per the applicable maintenance data.

Q: What is the MPN for AS159 10.3 oz cartridge?
A: The Manufacturer Part Number is AS159-10C.

Q: What color is AS159 silicone sealant?
A: AS159 is red, providing easy visual inspection of sealant coverage during and after application.

Q: Can AS159 be used without an adhesion promoter?
A: In most standard aircraft maintenance applications, AS159 silicone sealant provides adequate adhesion to metal, glass, and composite surfaces without a separate promoter. However, for critical structural or high-stress bonding applications, consult the applicable maintenance manual for surface preparation requirements.