The Silverfish population in the UK is growing, and NOPE! CP Silverfish Killer is here to protect your home from these strange silvery intruders. Silverfish are not seasonal pests, laying eggs throughout the year. They hide in warm, damp spaces and eat paper for breakfast! NOPE! uses a cypermethrin-based pesticide for a home-safe and easy-to-use Silverfish treatment. This spray offers long-lasting, odorless, and fast-acting protection for both indoor and outdoor use.