Alpine Cockroach Gel Bait Rotation 1 Reservoir was the first roach gel labeled Reduced-Risk by the EPA, meaning the active ingredient is safer around people, pets and the environment, yet is tough on household roaches. In fact, roaches almost can't resist the bait formulation of Alpine, and once they feed on the bait they will transfer it to other roaches causing eventual death. Alpine Roach Gel will start killing roaches within hours after contact. Alpine even attracts bait-averse cockroaches. Labeled for use indoors and outdoors and even sensitive areas such as food-handling establishments, food and feed processing plants, hospitals and nursing homes.