This standard specifies the required characteristics for heat-shrinkable polyolefin semi-rigid, limited fire hazard heat-shrinkable boots for use in aircraft electrical systems at operating temperatures between -30 °C and 105 °C.

The moulded shapes may 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 Tables 1 to 22. The colour is normally black.

Styles and dimensions other than those specifically listed in EN 4840-002 Tables 1 to 22 may be available as custom items. These items shall be considered to comply with this standard if they comply with the property requirements listed in Table 1 with the exception of dimensions.