P/S 870 Class A is a two-part manganese dioxide-cured polysulfide sealant that provides a corrosion barrier on aluminum alloys and dissimilar metals. It maintains elastomeric properties after exposure to jet fuel and aviation gas.
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Boeing Distribution (formerly Aviall)
This product has been replaced by new Part # PS870A2PT=5N
This sealant forms a robust protective barrier against moisture and corrosives. It cures at room temperature, maintaining elastomeric properties and adhesion to aircraft substrates after fuel exposure. The 2-hour application time suits brush application on non-fuel-tank components.
Features & Benefits
Effective barrier against common corrosion causes
Maintains elastomeric properties after fuel exposure
Two-part system cures reliably at room temperature
Strong adhesion to aluminum, magnesium, titanium, and steel
Brush application allows coating of complex surfaces
Ensures reliable, long-lasting performance in aviation environments
Specifications
Series: P/S 870
Manufacturer: PPG Aerospace/PRC DeSoto
Container Size: 1 pt
Form: Solid (Part A), Liquid (Part B), mixed as a paste
Color: Black/White (Parts A/B), Gray (Mixed)
Application Time: 2 hr (Class A-2)
Tack-Free Time: <24 hr
Curing Time: 64 hr (to handling strength)
Storage Temperature: 80°F (Max)
Temperature Rating: -65 to 250°F
Application Method: Brush
Domestic/Import: Domestic
Technical Information
Boeing Helicopter HMS 16-1097 Type III Class A-2 Approved
Lockheed STM40-111 Class A-2 Approved
Mitsubishi MM1076 Class A-2, Type 1, Grade A Approved
Naval Air MIL-PRF-81733 Type I-1/2 Class1 GA Approved
Product information provided "as is", and Boeing may add, change, discontinue or remove product information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
