In each case the repellents were extremely effective. Those studies are highlighted below.
Additional research is ongoing.
In multiple lab studies conducted at New Mexico Tech , rodents always avoided treated materials. Rodent Field Study A variety of treated materials have successfully prevented rodent damage to outdoor cables and wiring for more than six years. A series of laboratory bench tests and Lake Michigan field experiments, conducted under the auspices of the Aquatic Research Institute of East Chicago, IN, determined that Zebra mussels will not naturally attach to coatings prepared through this process. Saltwater Animals Replicated laboratory experiments resulted in various saltwater species easily attaching to untreated control coatings but not attaching to treated materials. Instead, they fled the area.