Bund Linings, Repairs & Surveys

Experts in providing robust, durable and compliant bund linings and associated works.

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Bunds are liquid containment systems designed to contain the release of liquids from storage tanks and vessels. Whilst concrete and mortar provide excellent structural properties, they are susceptible to breakdown, leading to cracks and leaks.

Bund linings are designed to protect the underlying substrate, creating an impermeable and durable coating.

Effective linings are a necessity for ensuring that bunds are reliable forms of secondary containment. They should be fully impervious and able to mitigate and control leaks and spills from fuel and chemical tanks.

At Strandek, we’re able to offer a range of chemically resistant linings and coatings, such as fibreglass (GRP) systems comprised of vinyl ester resin. These are seamless, chemical- and temperature-stable barriers optimized to protect bund walls and surfaces – ensuring regulatory compliance.

Our Services

Ensuring durable, compliant & reliable spill bunding

Strandek specialises in bund linings. Our services cover bund surveys and inspections, integrity and condition assessments of an existing bund, present feedback back on its regulatory compliance on bund wall requirements, provide estimates for its lifetime and quotations for refurbishment.

We also work with customers to help select the best system for newly constructed bunds. In both instances, we undertake compatibility testing with leading manufacturers to help choose a durable and compatible lining system.

Our services include:


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Bund lining specialists - since 1976

Watch our team install an indoor GRP bund lining

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Strandek offers a fully compliant, professional team with an excellent track record in linings and coatings.

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Bund lining systems

Regulatory requirements stipulate that spill bund walls and base surfaces should be impermeable to liquids.

Strandek offers high-performance bund linings to address this need. Our core systems are listed below - centering on viny ester resins with C-glass for fibreglass, but we also offer more bespoke resins if specific chemical resistance is needed.

Protecting bund Substrates

Should a primary containment vessel breach occur, a Strandek-installed bund lining would ensure spilt materials are adequately contained and recoverable - with virtually no external contamination.

Bunds walls are prone to losing liquid containment capacities due to bad detailing around joints, impact-related damage (cracks and abrasion) and chemical attack – particularly if exposed to aggressive chemicals.

When inspecting an existing bund, we typically look for evidence of damaged lining via a breakdown in the system membrane or leaks, cracks, biological growth, chemical staining and UV damage.

Reliable bund linings will not only ensure surrounding persons and the environment are protected in the event of a bund breach, but they will also prevent fines, repair costs and fines – which can exceed several million pounds.

Quality by design

Resin-based surface protection requires a high degree of skill and expertise. Working with ISO9001- ISO14001-certified brands, we are able to select and test a range of different materials to ensure that our applicators use the best resin-based systems for every project.

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Secondary Containment Requirements For Bunds

Containment bunds are an important part of any industrial site holding large quantities of liquids. Navigating the framework around the condition of your bund, the integrity of its lining and the level of maintenance required is a key requirement. Here, Strandek provides an overview of such a framework to assist you in ensuring you bund is compliant.


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Frequently Asked Questions

Cure times

Cure times for applied resins typically ranges from hours to days. GRP bund linings take 24 hours to by dry to touch and 72 hours for a full cure. The precise rate depends on the resin type, the type of solvent and level of catalyst added. Other factors centre on the temperature during curing and level of humidity.

How long does it take to install a bund lining?

The installation time for a bund lining depends on the surface area of the bund and the number of applicators. It also depends on the applicator skill set, the level of preparation and repairs required and the type of system used; hand laid systems, whilst more durable, do take marginally longer to install.

How long does a bund lining last?

A standard bund lifetime should range from 10-30+ years. In no particular order, the lifetime of a bund lining depends on several factors: (1) the system used, (2) applicator skill, (3) the quality and moisture content of the underlying substrate, (4) the compatibility of the lining with the chemicals and liquids contained and (5) the chemical, physical and biological demands of its operating environment.

Why are bund linings important?

Bunds are typically made from concrete and mortar. Whilst structurally strong, concrete and mortar become porous, brittle and susceptible to liquid ingress, ultimately risking a leak. Bund linings provide a chemically resistant, impervious barrier that is thin yet provides enhanced, long term protection for the underlying concrete. This increases the lifetime of the bund and helps to ensure compliance with HSE regulations.

What surface preparation is needed for a bund refurbishment?

For existing bunds, the inner lining and a thin layer of substrate should be removed and scaled back using some form of grit blasting. Structural repairs should be made to and damaged substrate (e.g. concrete cracks). If the substrate is damp or moist, it should be dehydrated. An inspection should be performed before relining.

How much does a bund lining cost?

Compared to a bund replacement, where the estimated cost of a replacement is high, bund re-lining work is approximately 20 – 30% of the cost. Most individual bund re-lining projects for chemical storage tanks cost around £2,000 – £4,000 depending on the size of the bund. For more selective bund repairs, the overall cost is likely to be a fraction of the cost of a new bund.

How compatible is a bund lining with my chemicals?

The chemical resistance of a bund lining with the chemicals contained within the primary containment vessel is a critical feature. A range of well-tested and proven resin linings and coatings are available for many substances, from GRP to epoxy. For more bespoke chemicals, compatibility can be arranged in conjunction with our manufacturing partners. Classic examples of bunded chemicals include sodium hydroxide, urea, transformer oils, gas and fuel (petrol, diesel), food manufacture (vegetable oil, acetic acid – vinegar, dairy), wastewater and chlorinated water, nitric acid, sulphuric acid, ethylene glycol, ethanol and many more.

What regulations exist for bund linings?

Regulations on bund design, maintenance and refurbishment have been outlined in more detail in the U.K. HSE site. The UK HSE regulations relevant to secondary containment spill bunds provide more detailed advice, particularly for fuel storage.

How can I choose a chemically resistant bund lining

One of the main requirements for an effective bund wall is a chemically resistant lining. This is particularly important for sites and locations storing large quantities of hazardous components. For oil bund linings, chemical bund linings, diesel bund linings and other types, a different system is recommended in most cases. Many of these are often variants of standard epoxy, fibreglass or other resin-based systems. More bespoke chemicals will require chemical compatibility testing.

Chemical compatibility testing for bespoke chemicals

At Strandek, we have a very close working relationship with leading manufacturers. We are able to arrange chemical compatibility testing if your chemical is bespoke or if there is limited performance data.

What surface preparation is required for a bund lining project?

Surface preparation in the form of bund draining, abrasive blasting and concrete repair is often required in many cases, particularly for existing bunds undergoing refurbishment.

What guidance is there for bund inspections and maintenance?

See document guidelines for bund inspections.

Where can I find official guidance on bund construction?

The Construction Research and Information Association has published advice on how to construct bunds for oil storage tanks that meet regulatory requirements. 

Why Choose Strandek®?

Since 1976, Strandek has provided high-quality glass fibre and other resin-based coatings to a range of satisfied customers in industry, government, construction and residential sectors alike.


Our team have extensive experience and we pride ourselves on reliable workmanship and competitive pricing.

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