The transient, two dimensional non-charring materials version of a numerical model developed to study the ignition of charring and non-charring materials is used to analyse the ignition process of epoxy when subjected to a monochromatic radiation source. The model has the significant feature of coupling the solution for the solid and gas phases through the boundary conditions at the gas/solid interface along with a global finite-rate thermal degradation for the solid phase. The predictions yield physically realistic results, and predicted ignition delays present a maximum deviation of 7.56 % when compared with published experimental data for an external radiation source with fluxes ranging from 1 MW.m -~ to 4 MW-m 2

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