Damp-proof cable junction box made of flame-retardant, halogen-free, glass-fiber-reinforced polypropylene, in 2-component plastic technology combined with puncture membranes made of thermoplastic elastomer. 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. There are permanently elastic, self-sealing puncture membranes on the sides and in the base for tool-free cable entry. The box is attached using a quick-mounting bracket or internal openings outside the sealing area.