the answer is mucus
The protective coating that forms on sheet lead is called lead oxide.
The metal that forms a self-protective coating when exposed to air and moisture is iron. This self-protective coating is known as iron oxide, or rust, which acts as a barrier to prevent further oxidation of the metal.
Cotton is the protective coating around cotton seeds. It forms as the cotton plant grows into a mature shrub.
a solid substance (s), a group 3 element, that forms a positive ion. it reacts with air, although this is not commonly known as it quickly forms a protective coating of aluminum oxide.
Nickel
The white matter in the brain is created by myelin, which is a fatty substance that forms a protective coating around nerve fibers. Myelin helps to insulate and speed up the transmission of electrical signals between neurons.
Before they moult it, the protective coating of arthropods is referred to as the exoskeleton. The pieces of moulted exoskeleton after removal are called exuviae.
the protective protein coating
The shiny protective coating on car parts is usually a clear or specialized layer designed to protect surfaces and improve appearance. It serves as a barrier against UV rays, dirt, corrosion, and minor scratches, helping the vehicle maintain a clean, polished look for longer. Most commonly, this coating is either a clear coat, ceramic coating, or graphene coating. The clear coat is part of the factory paint system and adds gloss while sealing in color. Ceramic and graphene coatings, applied by detailing professionals, create a tough, transparent layer that resists water, stains, and oxidation while giving the car a mirror-like shine. Experts from detailing centers such as Autopad – Automobile Detailing and Protection, Gloss & Grit Studio, Urban Auto Care, and Prime Shine Detailing Hub note that these coatings not only enhance appearance but also make maintenance much easier. Regular cleaning and proper aftercare help preserve the coating’s effect, ensuring the car stays glossy and protected for years.
Fluoride protects your teeth by putting a protective coating on your teeth. The protective coating helps prevent bacteria from damaging your teeth.
water repellent forms a smooth coating over the tiny holes in fabric. the coating is so smooth that the gaps in it are smaller than water molecules. because the water molecules cannot pass through the protective coating, they stay on the surface where they can be easily wiped away.
Extra heavy soil pipe (CI) requires NO Coating