What are the Different Tank Lining Materials – Our Guide

From storing drinking water to various industrial applications, water tanks are essential for the operation of many buildings. To ensure the longevity of your water tank, choosing the right tank lining materials is crucial. 

In this article, we will look at the different options and factors to take into consideration when selecting a tank lining material for your installation. 

What are the Common Water Tank Lining Materials? 

There are different types of materials commonly used for lining water tanks. Epoxy and polyurethane coatings are widely preferred for their durability, however, there are other options on the market. 

Let’s take a look at the different water tank coatings in a bit more detail:

Epoxy Coatings

Epoxy tank coatings are often chosen for their resistance to corrosion. This lining forms a smooth impermeable coating which makes it particularly suitable for potable water tanks. Epoxy linings provide a long-term solution.

Polyurethane Coatings

Polyurethane has exceptional chemical resistance and durability, making them another popular choice. They are suitable for a wider variety of applications – from industrial cooling towers and GRP tanks to potable water solutions. 

Here at COVAC, we use the high-performance solvent free polyurethane coating Acothane DW. This coating system is approved by WRAS and featured on the list of Approved Products for use in Public Water Supply by the DWI. 

Cementitious Coatings

Highly suitable for concrete tanks, cementitious coatings bond with the tank’s surface to create a barrier against corrosion. They are also suitable for potable water tanks.

Fiberglass Reinforced Plastic (FRP) Lining

FRP uses a mixture of fibreglass and resin to create a lining that is resistant to corrosion . This material is versatile and suitable for tanks made of various materials. Because of their durability FRP linings are often preferred in the chemical industry.

Rubber Linings

Rubber lining provides chemical resistance and physical protection. This makes it a good choice for tanks storing abrasive or corrosive materials. 

How to Choose the Right Tank Lining Material? 

To get the most out of your water storage tank and prevent potential contamination, it’s important to choose the correct lining material. 

Some of the key points to consider before choosing tank lining are: 

  • The temperature the tank will need to maintain (this may not be consistent throughout the tank);
  • How frequently the tank is used and how often you complete drain it to change the water;
  • The size of your tank;
  • The ambient conditions in your tank – is it exposed to strong sunlight or freezing conditions.

If you’re using your tank to store anything other than water the coating may react with the stored liquid and flake or blister. This can impact your facility’s operation and lead to expensive replacement costs.

It’s best to always speak directly with the coating provider as they will be able to answer technical questions and find the best solution for your needs. 

Why is Water Tank Lining so Important? 

Water tank lining plays an important role in protecting your water tank from the elements and preventing premature replacement. In particular it serves the following purposes:  

  • Corrosion Protection – Tank lining creates a barrier between the tank’s surface and the water stored in it, effectively stopping the development of corrosion. This is essential for galvanised steel water tanks which are particularly susceptible to rust. 
  • Increasing Durability – Another important benefit of tank lining is increasing the longevity of your water tank. With the minimised risk or corrosion, your tank is able to withstand wear and tear saving you money on maintenance. 
  • Chemical Resistance – In industrial applications where different chemicals might be stored and mixed with the water, lining provides resistance from these substances. 
  • Preserving Water Quality – For potable water tanks, water tank lining is important for preserving water quality. Bacteria like Legionella can quickly spread in stored water and contaminate it, so ensuring water remains safe for consumption is essential. 

Water Tank Lining with COVAC

If you’re looking for a professional tank lining service, COVAC can help. With over 25 years of experience, our expert team can tackle even the most challenging projects. We offer comprehensive water tank lining, repair and refurbishment, helping you maintain your tank and the quality of stored water in it. 

Get in touch with the team for your free no obligation quote. For any questions and additional information, don’t hesitate to give us a call.

  • Cert No. 22946

  • Cert No. 22946