A curable adhesive precursor, comprising (a) a first part comprising: (i) a first epoxy curing agent comprising at least one polyether amine and having an amine equivalent weight of at least 55 grams per mole of amine equivalents; (ii) a second epoxy curing agent distinct from the first epoxy curing agent or a secondary curative; (iii) a metal salt catalyst; and (iv) optionally, a toughening agent; (b) a second part comprising: (i) a first epoxy resin in an amount in the range of from 30 to 55 wt.-%, based on the total weight of part; (ii) a second epoxy-based resin distinct from the first epoxy resin in an amount in the range of from 4 to 40 wt.-%, based on the total weight of part; (iii) at least one phosphorous-based first flame retardant in an amount in the range of from 15 to 30 wt.-%, based on the total weight of part; (iv) optionally, at least one second flame-retardant distinct from the at least one first flame retardant in an amount in the range of from 5 to 17 wt.-%, based on the total weight of part; (v) a core-shell polymer toughening agent; (vi) optionally, an epoxy-based reactive diluent; and (vii) optionally, a filler material; wherein the total amount of flame retardant is lower than 25 wt.-% of the total curable adhesive precursor. (a) a first part comprising: (i) a first epoxy curing agent comprising at least one polyether amine and having an amine equivalent weight of at least 55 grams per mole of amine equivalents; (ii) a second epoxy curing agent distinct from the first epoxy curing agent or a secondary curative; (iii) a metal salt catalyst; and (iv) optionally, a toughening agent; (i) a first epoxy curing agent comprising at least one polyether amine and having an amine equivalent weight of at least 55 grams per mole of amine equivalents; (ii) a second epoxy curing agent distinct from the first epoxy curing agent or a secondary curative; (iii) a metal salt catalyst; and (iv) optionally, a toughening agent; (b) a second part comprising: (i) a first epoxy resin in an amount in the range of from 30 to 55 wt.-%, based on the total weight of part; (ii) a second epoxy-based resin distinct from the first epoxy resin in an amount in the range of from 4 to 40 wt.-%, based on the total weight of part; (iii) at least one phosphorous-based first flame retardant in an amount in the range of from 15 to 30 wt.-%, based on the total weight of part; (iv) optionally, at least one second flame-retardant distinct from the at least one first flame retardant in an amount in the range of from 5 to 17 wt.-%, based on the total weight of part; (v) a core-shell polymer toughening agent; (vi) optionally, an epoxy-based reactive diluent; and (vii) optionally, a filler material; (i) a first epoxy resin in an amount in the range of from 30 to 55 wt.-%, based on the total weight of part; (ii) a second epoxy-based resin distinct from the first epoxy resin in an amount in the range of from 4 to 40 wt.-%, based on the total weight of part; (iii) at least one phosphorous-based first flame retardant in an amount in the range of from 15 to 30 wt.-%, based on the total weight of part; (iv) optionally, at least one second flame-retardant distinct from the at least one first flame retardant in an amount in the range of from 5 to 17 wt.-%, based on the total weight of part; (v) a core-shell polymer toughening agent; (vi) optionally, an epoxy-based reactive diluent; and (vii) optionally, a filler material;