It is a simple way to reduce corrosion, by limiting the exposure of the metal to a corrosive environment. Paint is a very common product, but tar, pitch, bitumen, and plastics are also used. An important consideration for protective coatings is to ensure the coating has well adhered to the metal and that it remains intact or is regularly repaired/recoated. Therefore, this product is commonly used to protect culturally significant works, such as outdoor sculptures and architectural elements.