Surface treatments are specific insecticides that can be applied as pre-bin treatments and across a wide range of areas such as cracks and crevices, as well as the floors and walls of processing and storage facilities. The efficacy of surface treatments is affected by the type of surface, temperature, sanitation, and chemical formulation. The objective of this study was to evaluate three insecticides on metal and concrete surfaces to control six species of stored-product insects. Metal and concrete surfaces were constructed in the bottom of a 62 cm² plastic Petri dish. EverGreen© (active ingredient (a.i.), pyrethrin), Centynal EC™ (a.i. deltamethrin), and Sensat™ (a.i. spinosad), were applied at their label rates, and water was used as a control. Ten adults of one species, Tribolium castaneum (Herbst), Rhyzopertha dominica (F.), Cryptolestes ferrugineus (Stephens), Tribolium confusum Jacquelin du Val, Sitophilus oryzae (L.), or Oryzaephilus surinamensis (L.), were added to individual treated areas (n=5), along with ~500 mg of feed, and held for seven days. Adult beetles were observed after one, three, and seven days for the number of live, affected (those exhibiting uncoordinated movement or twitching or unable to walk) and dead beetles. Among all species, longer exposure to the treated surfaces resulted in increased mortality. Among all treatments, the percent survival (live + affected adults) was highest on concrete compared to metal for all species. Tribolium castaneum and T. confusum were the most tolerant species. Contact insecticides are an important component of a comprehensive integrated pest management program for controlling and preventing infestations. Understanding the impacts of surfaces on efficacy will provide pest management professionals with information to help them apply targeted applications within highly diverse post-harvest supply-chain storage and processing environments.