Plastic caps filled with sealing compound as combined protection against fuel and hydraulic fluid and against lightning strikes

Abstract

Provided herein are sealing compound-filled plastic caps for sealing of connecting elements in aircraft construction against liquids, wherein these plastic caps function as combined protection against fuel and hydraulic oil, especially that based on tributyl phosphate, and against lightning strikes, and can be produced and applied in an economically viable manner. The plastic cap for sealing of connecting elements in aircraft construction consists predominantly of at least one high-performance polymer having a breakdown resistance of at least 10 kV/mm to DIN IEC 60243, and has been filled with a sealing compound having a high energy absorption capacity and including at least one filler selected from the group consisting of gas- and/or air-filled hollow packings, where the plastic cap and the sealing compound are cohesively bonded to one another. Additionally provided is a method of filling and application of such plastic caps, and a corresponding aircraft.

Dependencies are inferred from the claim text.