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Acothane DW Nationwide Water Tank Services

Water Tank Coating Applicators

Posted on December 1, 2011

COVAC are specialists in the supply and application of a water tank coating as a protective method to help stop corrosion and erosion. It doesn’t matter what size your water tank is, we can provide a long term solution to help maintain your water retaining structures in prime condition. Our teams are all highly qualified and ensure that all work we complete is finished to the highest standards leaving our clients completely satisfied with our service.
We have a wealth of knowledge in this industry and having repaired many tanks throughout our 15 years in business, we know how important it is to use a cost effective, guaranteed solution for the coating of your water tank.

Problems can occur in all water tanks. Regardless of material it is manufactured from, each substrate has its own unique and common problems:


Corrosion which provides food for micro aquatic bacterial growth (including Legionella), Pseudomonas and Biofilm. Larger, sectional tanks also suffer from a breakdown of the mastic used to join the panels together causing serious leaks.  If steel tanks have any coating/lining at all it is usually a non (WRAS/DWI) approved bitumen or a failed rubber/butyl type liner. See link below for more detailed information:-

GRP (Glass Reinforced Plastic):

Black spore fungi and micro aquatic bacterial growth, even with regular cleaning, eventually breaks down the original gel coating of the substrate (sometimes in a matter of months) leading to osmotic blistering and fine cracks which in turn hide and protect further prolific bacterial growth.  Most GRP water tanks are made up in sectional panels and as with steel tanks, the mastic used for sealing the joints breaks down leading to extensive leaking.  Another common factor is corrosion, not of the substrate but the steel fastenings, bracings and bolts holding the panels together.  See link below for more detailed information:-


Over time, all unprotected concrete will absorb water and cause erosion of the substrate leading to blow holes and exposed aggregate.  An early sign of this is rust staining leaching through the concrete from the steel reinforcing bars.  Temperature changes will also cause the absorbed water in the substrate to expand and contract causing cracks, all these conditions are an ideal breeding ground for bacteria.  Underground concrete tanks can also suffer from ingress of untreated ground water and potential contamination.  See link below for more detailed information:-

Spray Application

Large Concrete Tank Inspection

All of these problems can be eliminated with our water tank coating service, giving you a cost effective solution by maintaining rather than replacing your tank with the added benefit of a minimum 10 year guarantee. Our 3M Scotchkote Urethane Coating 165PW has been proven to be resistant against the growth of bacteria and will help to prevent any corrosion on your water tank. This coating has excellent elongation properties allowing it to accommodate the structural movement of all water tanks and will leave your tank with a smooth, tough yet easy clean finish. By using this coating, you will reduce the risk of contamination and increase the lifespan of your water tank.

If you would like further information or a no obligation site survey regarding water tank coating, get in touch with us at COVAC where we can offer you a professional and reliable service using the very best water tank coating in the industry.

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