Abstract: The device for enclosing at least part of an elongation object, preferably a connection between electrical conductors, comprising a hollow dimensionally recoverable article having an aperture that communicates between the interior and the exterior of the article, and a quantity of material which seals an aperture. The material is self sealing so that it will allow penetration of a test probe through the material and will continue to seal the article after removal of the probe. Advantageously the article contains an arrangement for connecting electrical conductors, for example a solder insert or crimping connector.