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Cooling Tower Lining

In this blog post, we'll explore a recent project where we executed a seamless leak repair through relining a cooling tower sump, ensuring the towers long-term performance. Cooling towers play a critical role in many industrial processes, but they are often subjected to harsh conditions that can lead to wear and tear over time. One of the most common issues that cooling tower owners face is leaks in the sump, which can cause structural damage and affect the tower's efficiency. Here, we'll take a closer look at the relining process and the steps we took to guarantee a successful outcome for our client. All of our water tank relining services are supported with a 10-year guarantee as a testament to the quality of our own solvent-free, WRAS-approved polyurethane solution.



Relining Stages


  1. Surface preparation: The surfaces of the cooling tower were thoroughly cleaned and prepared for the relining process.

  2. Tightening of accessible bolts: All accessible bolts were checked and tightened to ensure the structural integrity of the cooling tower.

  3. Assessment and repair of mastic joints: All mastic joints were then carefully assessed and repaired where necessary to prevent any future leaks or structural issues.

  4. Abrasion of surfaces: All surfaces were then abraded to create a surface profile of approximately 75 microns, which ensured the new lining would adhere to the cooling tower and improve its longevity.

  5. Dehumidification/heating: Dehumidification and heating equipment were implemented when necessary to create the correct curing conditions prior to the application of our solvent-free polyurethane.

  6. Application of Stripe Coat: Our polyurethane was applied by brush to all joints, edges, bolt heads, struts, and other sharp protuberances to strengthen the security of high-risk areas and enable the subsequent coating to be a seamless membrane.

  7. Application of First Coat: Our product was fully applied by roller to all internal surfaces to achieve a minimum 500-micron wet film thickness.

  8. Application of Second Coat: A product was then applied a second time after the first coating had set, to achieve a minimum 500-micron wet film thickness, resulting in a desired 1000-micron total coating thickness on all internal surfaces.



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