Sandblasting is a powerful industrial technique that uses a high-velocity stream of abrasive particles to remove rust, paint, dirt and other contaminants from a surface. This technique is ideal for restoring metals, concrete and other hard surfaces, returning them to their original appearance and prolonging their useful life. However, despite its effectiveness, sandblasting is a very difficult task. sandblast It is not a universal technique, as using it on the wrong surfaces can cause irreparable damage. Therefore, it is essential to know where sandblasting should not be used.
Below, we'll explain what these surfaces are and why you should avoid using this technique on them. Let's get started!
Surfaces where sandblasting should not be used
Sandblasting, despite its effectiveness in cleaning many surfaces, can be a double-edged sword if applied incorrectly. The high pressure and abrasiveness of the projected particles can cause irreparable damage to certain materials. Some of the materials particularly vulnerable to this cleaning method are:
Glass and crystals
Glass and crystal are the main surfaces where sandblasting should not be used. Despite their tough appearance, they are surprisingly sensitive to scratches. Sandblasting, with its abrasive particles, can easily scratch the surface, compromising its transparency and aesthetics. In addition, the pressure of the blast can weaken the edges of the glass, increasing the risk of breakage.
For this reason, to clean glass and crystal, it is preferable to use specific cleaning products and soft cloths.
Treated or varnished wood surfaces
Another surface where sandblasting should not be used is treated or varnished wood, as it has a protective layer that protects it from moisture and external agents. Sandblasting, being extremely abrasive, removes this protective layer, leaving the wood exposed to deterioration.
In addition, the texture of the wood can be altered by the impact of the particles, leaving a rough and unattractive surface. Instead of sandblasting, it is recommended to lightly sand the wood with fine-grain sandpaper and apply a new coat of varnish or paint.
Soft metals such as aluminum or copper
Soft metals such as aluminium and copper are susceptible to scratches and deformation by sandblasting. This is because the abrasiveness of the particles can wear away the surface of the metal, leaving marks and scratches. Also, the high pressure of the blast can cause deformations in thin or complex shaped parts. For this reason, it is not recommended to use this technique on these types of surfaces.
Plastic or PVC panels
Another major material that should not be sandblasted is plastic, including PVC, as these surfaces are sensitive to heat and abrasion. When trying to clean them with this technique, they can melt or deform, especially if excessive pressure is used.
In addition, abrasive particles can become embedded in the material, leaving a rough, difficult-to-clean surface.
Delicate materials such as ceramic or glazed tiles
Finally, ceramic and glazed tiles are surfaces that should not be sandblasted. These materials have a protective coating that gives them a shiny, durable finish. Using this cleaning technique can damage that coating, exposing the base material and altering its appearance. In addition, the pressure of the sandblasting can chip or break delicate pieces.
Where is sandblasting recommended?
While sandblasting can damage certain surfaces, it is an extremely effective and versatile technique for a wide range of materials. When applied correctly, it can transform surfaces, removing contaminants and restoring them to their original state. Here are the ideal materials to use:
Industrial metals
Sandblasting is the most effective cleaning technique for removing rust, paint and other contaminants from metal surfaces. It also prepares the metal for subsequent processes such as welding or coatings, ensuring optimal adhesion.
Natural stone
The restoration of stone facades, monuments and architectural elements is one of the Most common applications of sandblasting. It allows you to remove dirt, moss, lichens and other encrustations, restoring the original appearance of the stone.
Concrete
Sandblasting is ideal for removing graffiti, stains and formwork residue from concrete. It is also used to prepare the surface before applying protective coatings.
Untreated wood
Although treated wood is not suitable for this technique, sandblasting can be used on untreated wood to remove deteriorated surface layers, creating a rough surface that improves the adhesion of new finishes.
Fiberglass surfaces
Sandblasting is effective for removing damaged gelcoat or paint from fiberglass surfaces, preparing parts for repair or repainting.
Benefits of sandblasting
Although this technique can be harmful if used on unsuitable surfaces, its application on suitable materials offers numerous advantages, such as:
- Deep cleaning: Removes embedded contaminants that other methods fail to remove.
- Surface preparation: Creates a clean and uniform surface, ideal for the application of coatings and adhesives.
- Restoration: Restores materials to their original appearance.
- Increased shelf life: Eliminates corrosion and other factors that deteriorate materials.
At Projectes Sastre we are specialists in Sandblasting Cleaning
At Projectes Sastre, specialists in Sandblasting Cleaning in Mallorca, we have years of experience perfecting the sandblasting technique. Thanks to our extensive experience, we know where this technique should not be used, and that is one of the keys to our methodology.
We make sure to sandblast only the right surfaces to avoid unnecessary damage. Our focus is on quality, safety and total customer satisfaction.
If you need a professional and thorough cleaning, do not hesitate to contact us. Our experts will advise you on the best solution for your specific needs, always ensuring safe and effective use of sandblasting. We look forward to seeing you!
