The Permatex Form-A-Gasket No.21 is a 1/2oz dried out used product, not for use and collectable. This gasket maker is manufactured by Permatex in the United States. The product is known for its high-quality sealing properties and is commonly used in automotive applications to create gaskets for various mechanical systems. With its convenient size and trusted brand, the Permatex Form-A-Gasket No.21 is a valuable addition to any automotive tool collection.