AI: 0.005% Brodifacoum. FINAL BLOX Rodenticide takes rodenticide efficiency to another level. Its active ingredient is Brodifacoum, an anticoagulant noted for its potency. FINAL BLOX combines this lethal poison with 16 other food grade ingredients, producing a highly attractive bait that unsurpassed in both acceptance and control. The BLOX have corrugated edges that appeal to rodents to nibble the baits.