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Choosing Among Various Chemical Resistant Coatings

Almost all coatings are being subjected to chemical attack, be it due to spillages, acid rain, cleaning products, and lubricants. While most of these chemicals are just mild and can damage only for a prolonged exposure, there are certain situations where stronger chemicals are encountered. The choice of chemical resistant coatings depends on several things such as the type and strength of the chemical, the level of exposure to such chemical, and the required preparation.

There are a few types of chemical resistant coating that can be used to protect a substrate from corrosion attack.

Epoxy coating
Usually, epoxies provide the greatest resistance against a wide range of chemicals. Regular epoxies may not offer outstanding resistance against strong chemical attack and staining might occur. But there are variations on standard epoxy coating that provide superb chemical resistance such as epoxy phenolic. It is specifically designed to protect internal tank linings. If your application requires high protection against weather effects, then you have to ensure that you choose the right epoxy product for it. 

Polyurethane or Acrylic
While acrylics may not provide as much resistance to chemicals as epoxies, they offer a good balance between physical appearance or aesthetics and chemical resistance. Usually, these chemical resistant coatings are used as second coat after an epoxy primer to enhance the overall resistance of the structure against chemical attack. 

Moisture-cured polyurethanes
This kind of polyurethane coatings offer good resistance to a wide range of chemicals. They are typically used on tank linings as well as external protective layer against various chemical attacks and corrosion.

Each of these chemical resistant coatings has its own strengths and weaknesses, depending on specific application. Teff-Line Ltd. has long years of experience in assessing different requirements to determine which type of coating provides the most protection to your structure. 

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