A Class C‑12 corrosion‑inhibitive sealant designed for faying surface and roller-applied sealing applications, providing long working life, excellent corrosion protection, and durable adhesion to aircraft substrates.
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Boeing Distribution (formerly Aviall)
This product has been replaced by new Part # PS870C12PT=5N
P/S 870 PS870C12PT is a two‑part, manganese dioxide‑cured polysulfide corrosion‑inhibitive sealant engineered for use on aluminum alloys and dissimilar metals. Designed for faying surface and coating applications, this Class C‑12 version offers a 12‑hour application life, ideal for large‑area sealing and assembly operations. The cured sealant forms a resilient elastomeric barrier that maintains flexibility after limited exposure to jet fuel and aviation gasoline. It withstands temperatures from -65°F to 250°F with intermittent excursions to 275°F. Packaged as a 1 pint kit, it provides high‑volume coverage suitable for aircraft structural corrosion protection.
Features & Benefits
Class C‑12 formula with 12‑hour working life
Provides a corrosion‑inhibitive barrier for aluminum and dissimilar metals
Designed for faying surface and roller-applied sealing
Maintains elastomeric properties after aviation fuel exposure
Strong adhesion to aircraft substrates when properly primed
Room-temperature curing with long-term environmental durability
Excellent repairability to fresh, cured, or aged surfaces
Specifications
Series: P/S 870
Container Size: 1 pint kit
Class: C‑12 (12-hour application life)
Form: Liquid (Part A), Solid (Part B)
Color: Part A – Black; Part B – White; Mixed – Gray
DISCLAIMER: Product information provided “as is.” Boeing may add, change, discontinue or remove this information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
