Modeling strain localization with a second gradient model can become problematic at the late stages of softening response, when the second gradient terms become significant compared to the first gradient terms. This is particularly true for mode I crack problems where an unrealistic spreading of the localized zone can be encountered. To deal with these limitations, a novel second gradient interface element for mode I crack propagation problems is introduced. It is shown that the model is able to correctly reproduce all the different phases up to failure; the adherence phase, strain localization, the transition from localized strains to cohesive zones and full crack opening.