PPG PR-1440 AMS-S-8802 Type 2 Class B-1/2 Polysulfide Fuel Tank Sealant – Pint Kit
PPG PR-1440 is one of the most widely specified polysulfide fuel tank sealants in commercial and military aviation, meeting AMS-S-8802 Type 2 Class B-1/2 specification. Designed specifically for aircraft integral fuel tank sealing applications, it provides the combination of fuel resistance, adhesion, flexibility, and durability required to maintain fuel-tight seals in the demanding operating environment of aircraft fuel tanks over the full aircraft service life.
The Type 2 classification indicates PR-1440 is a two-component system requiring mixing of base and accelerator prior to application. The Class B-1/2 designation specifies the working life (application time) category — a moderate working life that provides sufficient time for careful application of sealant to fuel tank joints and structures without premature gelling. This working life classification is the most commonly specified for production fuel tank assembly and MRO fuel tank resealing operations.
The pint kit provides a practical quantity for small-to-medium fuel tank sealing jobs, containing pre-measured base and accelerator components that ensure correct mixing ratio without manual weighing. The kit format minimizes the risk of mix ratio errors that could result in under-cured, off-specification sealant with reduced fuel resistance and mechanical properties.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 1440B81-2AMS-S-8802F-M12PT |
| Brand | PPG Aerospace |
| Product Series | PR-1440 |
| Specification | AMS-S-8802 Type 2 Class B-1/2 |
| Color | Gray |
| Product Type | Polysulfide Fuel Tank Sealant |
| Components | Two-Component (Base + Accelerator) |
| Working Life Class | Class B-1/2 |
| Package Size | Pint Kit |
| Substrate | Aluminum, Steel, Aircraft Fuel Tank Structure |
| Application Method | Brush, Extrusion Gun, Spatula |
| Industry Use | Commercial Aviation, Military, Fuel Tank MRO |
Technical Information
PPG PR-1440 is a polysulfide-based sealant that cures through an oxidative crosslinking reaction initiated by the manganese dioxide accelerator component. When base and accelerator are mixed in the correct ratio, the polysulfide polymer chains crosslink to form a three-dimensional elastomeric network with the outstanding chemical resistance and flexibility characteristic of cured polysulfide rubber.
The cured sealant provides full resistance to continuous immersion in Jet A, Jet A-1, JP-4, JP-8, and other aviation fuels, along with resistance to water, hydraulic fluid vapors, and the range of chemical contaminants that may be present in aircraft fuel systems. Its inherent flexibility allows the cured sealant to accommodate the structural deflections, pressure cycling, and thermal expansion/contraction of the fuel tank structure over thousands of flight cycles without cracking or losing adhesion.
The Class B-1/2 working life provides a balance between sufficient application time for careful sealant work and acceptably short cure time for maintenance schedule requirements. All mixing, application, and cure schedule parameters are defined in the PPG PR-1440 technical data sheet, which must be followed to ensure the cured sealant meets the full AMS-S-8802 Type 2 specification property requirements.
Why Choose PPG PR-1440 Fuel Tank Sealant?
- ✅ AMS-S-8802 Type 2 Class B-1/2 Qualified — Industry-standard fuel tank sealant spec
- ✅ Full Aviation Fuel Resistance — Jet A, Jet A-1, JP-4, JP-8 compatibility
- ✅ OEM Approved — Boeing, Airbus, and military aircraft approved
- ✅ Pre-Measured Pint Kit — Correct ratio guaranteed, no weighing errors
- ✅ PPG Aerospace Quality — Globally trusted fuel tank sealant brand
Applications and Compatible Aircraft
PPG PR-1440 is used for aircraft integral fuel tank faying surface sealing, fillet sealing, injection sealing, and fastener wet installation on commercial aircraft including Boeing 737, 747, 757, 767, 777, 787, Airbus A320, A330, A350, A380, and military aircraft where AMS-S-8802 Type 2 polysulfide fuel tank sealant is specified.
Frequently Asked Questions
Q: What does Class B-1/2 mean in AMS-S-8802?
A: Class B-1/2 specifies the working life (pot life after mixing) of the sealant — Class B has a working life of approximately 2 hours at 77°F, and the -1/2 designation indicates a half-unit variant. This provides sufficient working time for careful fuel tank sealing without excessive wait time before the joint can be inspected or the tank returned to service.
Q: Is PPG PR-1440 approved for Boeing aircraft fuel tanks?
A: Yes. PR-1440 is approved to Boeing and other major OEM fuel tank sealing specifications. Verify the specific BMS approval for your aircraft type in the applicable Boeing AMM or PPG product approval list.
Q: What is the MPN for PR-1440 Pint Kit?
A: MPN is 1440B81-2AMS-S-8802F-M12PT. Spec: AMS-S-8802 Type 2 Class B-1/2.
Q: What is the mixing ratio for PR-1440?
A: Refer to the PPG PR-1440 TDS for the specific base to accelerator mixing ratio. The pint kit contains pre-measured quantities to ensure correct ratio when the full kit is mixed.
Q: Can PR-1440 be applied by brush and gun?
A: Yes. PR-1440 can be applied by brush for faying surface and wet installation sealing, and by extrusion gun (such as Semco Model 440) for fillet sealing and injection applications, depending on the specific sealing application requirement.
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