Seal (device)

A seal is a little tool that is used to make sure things don't come apart. It's like a sticker you put over two pieces of paper so they don't fall apart. A seal can be made of plastic, rubber, or metal.

Seals are important for lots of different things like refrigerators, cars, and airplanes. For example, your fridge has a seal along the edges of the door to make sure the cold air doesn't escape, keeping your food cold. A seal in a car engine makes sure oil doesn't leak. A seal on an airplane door makes sure the passengers and pilot stay safe while flying.

Sometimes you can see seals, but other times they are hidden inside a machine. If a seal breaks or doesn't work, it can cause problems and things might not work as they should, which is why having a good seal is so important.