How to Remove Line Marking Paint from Concrete?

Here are some effective methods for removing line marking paint from concrete:

1. High-pressure water gun flushing method:

- Use a high-pressure water gun to impact the line marking coating film, which is suitable for removing solvent-based, hot melt spray-based and water-based paints.

- It requires a high-pressure water pump, a spray gun and sufficient flushing water, which is suitable for removing old lines over a large area.

2. Grinding removal method:

- The alloy grinding cutter head is driven by a power device to rotate at high speed, fully contacting and grinding with the road markings, thereby achieving the removal effect.

- It is suitable for cement concrete and asphalt pavements, easy to operate, and widely used in busy traffic environments in cities.

3. Painting method:

- Evenly apply black paint on the original old line marking spray paint, which is a simple and quick removal method.

- As the paint wears, the original old markings will gradually appear, so this method can only have a short-term removal effect.

4. Sandblasting cleaning method:

- A technique that uses a nozzle to propel abrasives (such as steel sand, quartz sand, iron sand, etc.) at high speed to clean the surface of the material.

- The cleaning effect is significant, but the efficiency is low, the construction process is relatively difficult, and the cost is relatively high.

5. Heating cleaning method:

- For line spray paint that has just been completed and has not yet solidified, it can be softened by heating.

- Use a shovel to scoop up the softened markings, but be aware that this method may leave residues and easily cause pollution to the road surface.

6. Chemical cleaning method:

- Use a professional marking paint remover, which usually contains chemical components that can dissolve marking paint.

- Apply the remover evenly on the markings, wait for a while, and then remove it with a scraper or brush.

When choosing a specific method, please decide based on the type of marking paint (hot melt or normal temperature), the thickness of the markings, the actual situation of the concrete, and the efficiency and safety requirements of the cleaning work. Also, for large removal jobs, it is recommended to first test on a small area to ensure that the chosen method is effective and will not cause damage to the concrete.