Plastic seals are small, often colorful, devices used to secure items and prevent tampering. They are commonly made from materials like polypropylene or polyethylene and can be found in various applications, including packaging, shipping, and even in food safety. These seals provide a visual indication if a package has been opened or altered. In addition to their protective function, plastic seals are also used for identification and branding. Many companies print their logos or information on these seals, making them a useful marketing tool. Overall, plastic seals are an effective way to ensure the integrity and safety of products.