Advion Cockroach Gel Bait Master Shipper Insecticide (Agency) (Do Not Break Case). Advion Cockroach gel bait is a high-performing product targeting all prevailing pest species of cockroaches, including German (also gel bait-averse), American, Australian, brown, smoky brown, Oriental, brown-banded and Asian cockroaches. It combines a highly attractive, proprietary gel formulation with a potent, non-repellent active ingredient. Cockroaches cannot resist this superior combination, and even the toughest populations are quickly controlled.