Results of chloride permeability tests on latex modified concrete (LMC) with a wide range of air contents are presented. Air void data from these experiments are compared to air void results from other sources. Conclusions regarding chloride permeability and the air void system of LMC are given. The 6-h permeability test is described; comments are made regarding an additional measurement to be considered for inclusion in the method. Recommendations are given for future study of the chloride permeability of LMC.