Semi-permanent coating

The surfaces to be protected are treated first with a penetrating sealer (permanent protection component) which prevents the paints and varnishes from penetrating deep into the substrate. A temporary (sacrificial) layer is applied and subsequently "removed" while removing the graffiti. A new coat needs to be applied. Semi-permanent protected surfaces can be cleaned in an environmentally friendly way using hot water high pressure. Chemical graffiti removers are usually not necessary. Semi-permanent coating is ideal for natural stone walls and is frequently used for listed historic buildings.

Removing graffiti from clinker or concrete, for example, can be expensive if you don't take sufficient care. With our semi-permanent graffiti protection, you are on the safe side - also when it comes to the cost risk. The areas to be protected are impregnated with the first application of graffiti protection, the so-called permanent protection component. The impregnation prevents deep penetration of paints and varnishes into the surface.

A second "seperation layer" is then applied, which is "removed" when the graffiti is removed and should be renewed or reapplied. With system cleaners, multiple graffiti removals are also possible without re-coating and without creating shadows. Semi-permanently protected surfaces are cleaned in an environmentally friendly manner with high-pressure hot water without the use of chemical graffiti removers.

Technical process

1. Semi-permanent coating (A. sealer and B. sacrificial layer) is applied on the surface.

2. normal moisture evaporation through semi-permanent coating .

3. paint is sprayed on the semi-permanent coating and is blocked at the surface by the sacrificial layer. The sealer prevents the paint from sinking deep into the substrate.

4. Graffiti and underlying coating are cleaned off with hot water high pressure. The sealer is not affected.

5a. the sacrificial coating is re-applied on the affected areas.

5b. Graffiti can still be removed several times with a hot water pressure device, with the addition of system cleaners, without renewing the sacrificial layer.


• environmentally friendly
• hydrophobic (water repellent)
• provides insulating protection
• easy removal of graffiti
• easy application, fast drying
• reduces water absorption in surface pores

• increases resistance against frost and thawing cycles
• reduces the accumulation of dirt
• protects against road salt, pollution, moss and mould
• no optical change of the surface
• reduces adhesion of posters
• 5 years function guarantee 

Application range

Mineral substrates (unpainted):
• fired clay, clinker, brick
• concrete (raw/washed)
• limestone

Natural stone substrates (unpainted):
• sandstone
• marble / granite
• travertine
• all porous natural stones

SEMI-Guard graffiti protection, graffiti removal


The video shows a graffiti removal on a sandstone surface which has been protected with SEMI-Guard (the lower area). The graffiti removal was carried out only using hot water and high pressure, and completely without the use of any chemical graffiti removers. 

Above: Unprotected area
Bottom: Protected area (semi-guard)

4 color sprays and 2 edding / felt markers were applied as colorants.






Semi-permanent graffiti protection

SEMI-Guard is an environmentally friendly, quick-drying and transparent impregnation system with a graffiti protective layer. Open to diffusion - easy processing, no visual change in the surface. Proven use in monument preservation and protection.

Product Details


Selection of the appropriate coating system

The choice of the appropriate surface protection depends on the physical properties of the construction, the risk situation (e.g. busy street, bus stop in front of the door) and your individual requirements. 

Click here for help on selecting the best possible anti graffiti coating

More questions?
Give us a call or use our contact form. We will be glad to answer your questions or send you a non-binding offer.

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