Classified by function:
Protective coating: The main purpose is to protect the substrate material from external environmental erosion, such as anti rust paint on metal surfaces, which can prevent metal from being oxidized and rusted; There are also weather resistant coatings used on outdoor facilities that can resist UV rays, wind and rain erosion, and extend the service life of objects.
Decorative coating: focuses on enhancing the aesthetic appearance of objects, such as various wood coatings on furniture surfaces, with different colors and glossiness to choose from, which can make furniture look more beautiful; Car paint is also a type of decorative coating that gives the appearance of the car a more textured feel.
Functional coating: It has special functions, such as thermal insulation coating, commonly used in glass or exterior walls of buildings, which can effectively block heat transfer and play a role in energy conservation and cooling; There are also conductive coatings that can be applied to some components of electronic devices to ensure the normal conduction of current.
Classified by ingredients:
Organic coatings: mainly composed of organic polymer materials, such as coatings formed by common acrylic coatings and coatings formed by epoxy resin coatings. These coatings often have good flexibility and strong adhesion, and are widely used in many fields.
Inorganic coatings, such as ceramic coatings, are made of inorganic compounds and have advantages such as high temperature resistance, high hardness, and wear resistance. They are commonly used in high-temperature and high wear environments such as aircraft engine blades and wear-resistant components of industrial machinery.
Metal coating: a coating formed by covering metal on the surface of a substrate through electroplating, thermal spraying, or other methods, such as chrome coating, which has good decorative and anti-corrosion properties and is commonly used in bathroom hardware and other products; There is also a galvanized coating that can effectively protect steel products from corrosion.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K.     
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.