Hardener for cold hardening epoxy resin adhesives having fast hardening

The invention relates to an adduct AD obtained from converting at least one novolak-glycidyl ester containing 2.5 to 4 epoxy groups per molecule on average together with an amine mixture containing Bis(6-aminohexyl)amine and at least one amine A1, different from Bis(6-aminohexyl)amine, which has at least one primary amino group. The amine mixture preferably has a technical quality of Bis(6-aminohexyl)amine, which contains 25 to 82 wt% Bis(6-aminohexyl)amine. The adduct AD can be produced easily and without the use of solvents and enables low-odor, low-toxicity, and low-viscosity hardeners, which can also be processed and stored in the cold. Epoxy resin compositions which are thus hardened build up adhesive forces and high strength very quickly outdoors at environmental temperatures, even on difficult to adhere substrates.