Using Residual Insecticides For Silverfish Control
Insecticide concentrates, such as LambaStar UltraCap 9.7, Cyper WSP, and D-Fense SC are used for spraying a residual insecticide for silverfish control.
These residual insecticides, sprayed around entry points and foundation of the house would be the first step.
Spray along the foundational wall, with a two or three-foot band around the perimeter of your home.
After this, add to your program an insecticide bait or an insecticide dust to your attic area.