If you have ever watched a traditional sandblaster at work, you will remember the dust. Great clouds of it, drifting over neighbouring gardens, cars and open windows. For many jobs across Scotland that simply is not acceptable any more. This is where wet blasting comes in.
Wet blasting mixes water with an abrasive media before it hits the surface. The result is a much cleaner, quieter and more controlled process that still strips paint, rust and staining effectively. In this guide we explain how wet blasting works, where it shines and when another method might suit your project better.
Wet blasting, sometimes called vapour blasting or slurry blasting, combines three things: compressed air, water and a fine abrasive. The water surrounds each particle of media as it travels, which cushions the impact and traps the dust at source.
Because the water carries the abrasive, the operator can often work at lower pressure than a dry system would need. That makes the process gentler on the surface underneath while still cutting through coatings.
Dry blasting relies entirely on air to propel the media. It is fast and suits heavy industrial work, but it creates a lot of airborne dust and needs extensive containment. Wet blasting keeps most of that dust out of the air, so it is far better suited to busy streets, occupied buildings and sites close to neighbours.
Wet blasting is a flexible method. Some of the most common uses we see include:
- **Paint and coating removal** from masonry, brick and concrete
- **Rust removal** from metalwork, railings and gates
- **Preparing surfaces** for new coatings, where a clean, even key is needed
- **Cleaning in sensitive locations** such as town centres, schools and business parks
- **Removing staining** from hard surfaces without leaving a dusty mess behind
On many coating removal jobs, wet blasting sits alongside other systems rather than replacing them. A good contractor will choose the right tool for each part of the building.
No single method suits every surface. Here is how wet blasting compares with some of the other options.
Soda blasting uses bicarbonate of soda, which is soft and breaks down on impact. It is ideal for delicate materials, fire-damaged timber and surfaces where you want no profile left behind. Wet blasting with a harder media is usually more aggressive, so it suits tougher coatings.
DOFF cleaning uses water heated to around 150 degrees at low pressure, with no abrasive at all. It is the go-to method for historic sandstone, biological growth and many paint removal jobs when combined with a softener. If the stone is fragile, DOFF will often be the safer first choice.
Shot blasting fires hard steel shot or grit and is designed for structural steel, cast iron and concrete floors. It removes heavy scale and rust quickly but is far too harsh for most stone.
You can see how these systems fit together on our [blast cleaning systems page](https://blastcleanscotland.co.uk/systems).
It can be, but it depends on the stone, the media and the operator. Scotland's sandstone varies enormously, and some types are soft enough to be damaged by any abrasive. That is why we always recommend a test patch on historic or listed buildings before full work begins.
In many cases we find that a combination works best. DOFF might handle the main elevations, while wet blasting tackles a stubborn coating on a plinth or a metal railing. If you are dealing with painted stone, our [paint and coatings removal service](https://blastcleanscotland.co.uk/service/paint-and-coatings-removal) explains the full range of options.
A common question is what happens to the water and spent media. On a well-run job, the slurry is collected, contained and disposed of properly. Containment sheeting, drain protection and careful planning all help keep the site tidy and within environmental rules.
When comparing wet blasting services, ask these questions:
- Do they offer more than one system, or will they use wet blasting for everything?
- Will they carry out a test area first?
- How will they contain and dispose of waste?
- Do they hold relevant accreditations for work at height and on commercial sites?
A contractor with a full range of equipment has no reason to push one method over another. They can match the process to the surface.
Blast Clean Scotland works across Edinburgh, Fife and the whole of Scotland with wet, dry, soda, DOFF and shot blasting systems. Whether you need paint stripped from a shopfront, rust removed from railings or a coating lifted from brickwork, we can recommend the right approach.
Send us a few photos through our [contact page](https://blastcleanscotland.co.uk/contact-us) or call 01592 664159 for a free, no-obligation quotation.
