A curable epoxy resin composition comprising: (a) at least one multifunctional epoxy resin having an epoxy functionality of greater than 1 and that functionality is based on glycidyl amine, or glycidyl ether, or both; (b) a hardener composition comprising: i. at least one aliphatic or cycloaliphatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature within the range of 30°C-100°C, wherein said aliphatic or cycloaliphatic amine curing agent is selected from a group consisting of: isophorone diamine, triethylamine, diethylamine, triethylenetetramine (TETA), polyether amines; ii. at least one aromatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature of 120°C or greater, wherein said aromatic polyamine curing agent is selected from a group consisting of: 3, 3' diaminodiphenylsulphone, 4, 4' diaminodiphenylsulphone; 4,4'-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), 4,4'-methylene-bis-(2,6-diethylaniline) (MDEA), 2,6-diethylaniline, dianiline; wherein said epoxy resin composition has a cure onset temperature of < 50°C as measured by Differential Scanning Calorimetry at a rate of 5°C/minute and is curable at a temperature of 120°C or less for a time period of less than 10 minutes to achieve a degree of cure higher than that derived from the same composition with just (i) aliphatic or cycloaliphatic amine or (ii) aromatic amine in isolation. (a) at least one multifunctional epoxy resin having an epoxy functionality of greater than 1 and that functionality is based on glycidyl amine, or glycidyl ether, or both; (b) a hardener composition comprising: i. at least one aliphatic or cycloaliphatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature within the range of 30°C-100°C, wherein said aliphatic or cycloaliphatic amine curing agent is selected from a group consisting of: isophorone diamine, triethylamine, diethylamine, triethylenetetramine (TETA), polyether amines; ii. at least one aromatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature of 120°C or greater, wherein said aromatic polyamine curing agent is selected from a group consisting of: 3, 3' diaminodiphenylsulphone, 4, 4' diaminodiphenylsulphone; 4,4'-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), 4,4'-methylene-bis-(2,6-diethylaniline) (MDEA), 2,6-diethylaniline, dianiline; i. at least one aliphatic or cycloaliphatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature within the range of 30°C-100°C, wherein said aliphatic or cycloaliphatic amine curing agent is selected from a group consisting of: isophorone diamine, triethylamine, diethylamine, triethylenetetramine (TETA), polyether amines; ii. at least one aromatic amine curing agent having one or more amino groups per molecule and capable of curing said at least one multifunctional epoxy resin at a temperature of 120°C or greater, wherein said aromatic polyamine curing agent is selected from a group consisting of: 3, 3' diaminodiphenylsulphone, 4, 4' diaminodiphenylsulphone; 4,4'-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), 4,4'-methylene-bis-(2,6-diethylaniline) (MDEA), 2,6-diethylaniline, dianiline;