Often polyurea bund lining require lining due to poor construction, damaged mortar joints on brickwork or corroded steel structures. Regardless of the cause, the lining should be highly chemically resistant and durable to protect against any spills that may occur. Choosing the right bund lining can be quite challenging, depending on the type of chemicals stored and how they will be handled within the bunds themselves. Fibreglass linings are good for aggressive chemical environments but can be costly, while epoxy is less suitable and susceptible to movement stress cracking.
The best choice for bund linings is polyurea as it offers superior protection and durability. It also provides high resistance to abrasions, punctures, UV radiation, temperature extremes and a range of chemicals.
Polyurea Bund Lining Explained: Applications, Advantages, and Considerations
Before applying the coating the substrate must be clean, dry and free from any oil/contaminants. If required, high-pressure water blasting or abrasive cleaning methods can be used to achieve this. It is also vital that any existing liners or coatings are removed before application to ensure a fully adhered surface.
The substrate should be primed if necessary (depending on the tank/bund material). It is important to check moisture content before application as polyurea begins to set within seconds of being sprayed. Therefore, it is critical that all areas are adequately ventilated and the application team are wearing masks to minimise exposure to the strong fumes and odors. In addition, periodic reapplication of the polyurea will help to maintain its protective properties and prevent degradation.
