Silverfish

Silverfish are slender, wingless insects, shiny silver in appearance, approximately 10mm long with three, long bristletails at the end of their body. They can be found in moist places such as kitchens and bathrooms, underneath floors, sinks, in cupboards, and along pipes where they hide during the day and feed during the night. They are extremely fast runners and are sometimes seen trapped in wash hand basins or baths where they are unable to climb out. Silverfish are scavengers and can cause damage in the home by eating materials such as wallpaper, or books and other materials that are high in protein, sugar, starch, cereals. They are easily controlled with sprays.

How to Prevent Entry

Preventing silverfish from living in your home is mostly a case of controlling the environment to make it uncomfortable for them:

reduce available water and lower the humidity in the home with dehumidifiers and fans
repair leaking plumbing and make sure areas such as kitchens, bathrooms and laundry rooms are well ventilated
remove old boxes and stacks of papers, magazines, books and fabrics
keep your home clean and free from damp

Then:

seal all cracks and crevices with a suitable sealant compound or decorators caulk