This document specifies the required characteristics for fluoroelastomeric, heat-shrinkable boots for use in aircraft electrical systems at operating temperatures between −55 °C and 200 °C.

The moulded shapes can be supplied with a pre-coated adhesive. Refer to the manufacturers/suppliers for options. A guide to adhesive compatibility is given in Annex A.

These moulded shapes are normally supplied in the styles and dimensions given in EN 4840‑002. The colour is normally black.

Styles and dimensions other than those specifically listed in EN 4840‑002 can be available as custom items. These items are considered to comply with this document if they comply with the property requirements listed in Table 1 with the exception of dimensions.