The growing adoption of electronic shelf labels (ESLs) in grocery stores presents a unique challenge: how to manage ESL installation in wet-wall displays.
Frequent misting and hard-water deposits can affect screen readability, lead to additional maintenance, and, if not properly protected, shorten the lifespan of ESLs. While exposure to moisture is an unavoidable part of wet-wall produce displays, there are ways to protect your ESL investment.
The level of protection needed depends on the conditions ESLs are exposed to, particularly how frequently they come into contact with moisture.
Produce wet walls use misting systems to maintain moisture around fresh vegetables. Depending on the misting schedule, installed ESLs may be exposed to water repeatedly throughout the day. Other grocery departments, including meat and seafood counters or floral displays, may present similar moisture-related challenges.
Store water quality can introduce additional concerns. As mist evaporates, dissolved minerals can leave deposits and limescale on digital price tags. Over time, the buildup can create a film that makes pricing information difficult to read. Mineral deposits may also interfere with exposed ESL ports or buttons.
Some ESL models are designed for refrigerated or high-moisture environments. However, an environmental rating doesn't necessarily prevent mineral deposits from accumulating on the display surface.
For grocery retailers installing hundreds of labels in a produce department, even minor maintenance issues can become costly.
Electronic shelf labels can be a significant investment, particularly for grocery chains converting multiple locations to digital pricing. Ongoing maintenance costs can add to the initial purchase and installation expenses.
Wet-wall conditions can create several ESL maintenance concerns:
If mineral buildup is a significant problem, employees may spend considerable time cleaning individual labels. Damaged units also introduce additional replacement costs, particularly when the same conditions persist across multiple stores.
Protective accessories can help retailers reduce the amount of cleaning required and limit direct exposure of the ESL surface to mineral deposits.
Read our blog post, “Freezer-Ready ESL Holders: Choosing ESL Holders for Cold, Wet, and High-Traffic Retail Zones,” to learn more about ESLs in wet environments.
ESL protection covers provide an additional barrier between digital price tags and the surrounding environment. In wet-wall applications, the removable cover collects mineral deposits that would otherwise accumulate on the label's surface.
When mineral buildup begins to interfere with readability, employees can simply remove the affected cover and snap on a replacement. The inexpensive accessory can be replaced without removing or cleaning the more costly electronic label.
Converting from paper to electronic shelf labels can be quite a project. Our latest blog post, ”Grocery Store Electronic Shelf Label Rollouts Without Disrupting Store Ops,” provides tips to make it easier.
An effective protective cover should fit the ESL securely without interfering with normal operation. Employees also need to be able to replace covers quickly during routine store maintenance.
ESL protection cover features to look for include:
Retailers should confirm that protective covers are compatible with their existing ESL models and mounting hardware. Electronic labels vary in size and attachment design, so a cover must be manufactured to fit the specific model.
For grocery chains using different fixture configurations across multiple locations, verifying compatibility early can help avoid installation problems.
When a national grocery chain began experiencing hard-water buildup on electronic shelf labels in its produce departments, the retailer turned to Kinter for a custom solution.
Kinter's engineering team visited the store to evaluate the application and developed a clear PETG snap-on cover. The design allowed employees to scan tags and update pricing without removing the protective accessory.
"The beauty of this cover is in its simplicity," said Paul White, President and CEO of Kinter. "When moisture builds up, store teams don't need to waste time scrubbing down an ESL. They just pop it off and snap on a new one. It's pennies on the dollar instead of replacing the tag itself."
The patent-pending cover helped reduce cleaning and replacement costs by allowing store employees to replace the inexpensive protective accessory rather than the electronic label.
Kinter developed the cover in-house through its Custom Design and Capabilities department. The project illustrates how custom-engineered hardware can address a recurring maintenance problem across multiple grocery locations.
Read Kinter’s ESL cover case study.
The grocery chain's experience also highlights the importance of evaluating store conditions before selecting ESL accessories. Fixture compatibility and ease of maintenance deserve consideration early in the installation process.
Before selecting ESL mounts and protective hardware, retailers should evaluate the environmental conditions in each department.
Moisture-prone locations, such as produce wet walls and refrigerated cases, may require different mounting or protection solutions. Identifying the requirements early can help retailers select accessories that fit existing fixtures and simplify ongoing maintenance.
Kinter recommends asking the following questions when planning an ESL installation:
Testing hardware, including ESL covers, in representative store environments can help identify compatibility or maintenance concerns before a full rollout.
Wet-wall conditions can make electronic shelf label maintenance an ongoing expense for grocery retailers in labor and replacement costs. Kinter's custom ESL protection covers offer a practical way to manage hard-water buildup while reducing the need to clean or replace electronic labels.
Whether you're protecting an existing ESL installation or planning a new rollout, Kinter can help identify mounting and protection solutions suited to your store environment.
Explore Kinter’s electronic shelf label solutions or contact the KinterCare team to discuss your application.