Stopaq Splash Zone Success: An Italian Case Study in Long-Term Pile Rehabilitation

Today we’re looking at a fascinating long-term case study from Italy involving the rehabilitation and recoating of marine piles. (I’ve only had the chance to visit Italy once—but it is one of my favorite places!)

This project began in 2012 and continued for years, ultimately rehabilitating hundreds upon hundreds of pilings. What makes this story especially compelling is not just the scale—but the environment.

Anyone who works around marine infrastructure knows the splash zone is one of the most punishing environments a coating system can face.

Constant wet-dry cycling.

Salt exposure.

UV radiation.

Mechanical impact.

Cathodic protection influence.

In this case, the client was experiencing coating failures within just six weeks of application. The primary culprits were:

• Impressed current interference

• Salt entrapment

• Coating cracking

That kind of rapid failure doesn’t just create maintenance headaches—it drives up lifecycle costs and undermines confidence in the entire protection system.

Before any new coating system was installed, the piles were prepared using high-pressure waterjetting.

This step is critical in marine rehabilitation. Proper surface prep removes salts and contaminants without embedding additional debris into the steel surface—an essential factor when previous failures were partially attributed to salt entrapment.

The rehabilitation utilized products from Stopaq, specifically:

• Wrappingband WSH

• Outerwrap

• Wrappingband CZH

• Outerglass Shield XT

One particularly noteworthy detail: Wrappingband WSH can be applied underwater. That capability dramatically increases installation flexibility and reduces downtime in tidal or continuously wet environments.

Because the project extended over many years, the client had the opportunity to inspect performance across multiple seasons and service cycles.

What stood out?

Flexibility.

In the splash zone, rigid coatings often fail because they cannot tolerate movement, thermal cycling, or mechanical stress. A system that maintains flexibility while continuing to seal against moisture ingress has a significant advantage.

Over time—and across hundreds of rehabilitated pilings—the system demonstrated durability in an environment where previous coatings had failed in weeks.

That kind of field validation speaks louder than any datasheet.

This wasn’t a short-term test patch. It was an ongoing rehabilitation program. The ability to observe performance over years provided meaningful confidence in the system’s durability.

Marine pile rehabilitation is expensive, disruptive, and complex. When a solution proves itself in the splash zone, that’s worth sharing.

If anyone from Stopaq Italy would like to add technical insights or additional field details, please feel free—real-world case studies like this are invaluable to the industry.