Damp-proof cable junction box made of flame-retardant, halogen-free, reinforced thermoplastic, combined with puncture membranes made of thermoplastic elastomer in 2-component plastic technology. The box with a high protection class is weather- and UV-resistant, as well as impact-resistant and shatter-proof. Ideal for extreme use or installation indoors and outdoors. High resistance to vegetable and animal fats, mineral oil, diesel, weak acids, weak and strong alkalis and alcohol. Permanently elastic, self-sealing, lateral puncture membranes in a patented combination with an integrated thread make both direct cable installation through the membrane and the use of M20 cable glands without a lock nut possible. At the same time, thanks to the break-out opening, it is also suitable for cable entries in M25. There are entries in the base with permanently elastic, self-sealing membranes. Captive quick-release cover screws close the box with just a quarter turn. The box is fastened using internal openings outside the sealing area. Ideal installation conditions due to the enlarged interior and large number of fastening options.