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Commercial Cleaning • Industrial Cleaning
Grounds & Estate Maintenance

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Graffiti & Paint Removal 

For removal of graffiti and paint from brick, masonry, concrete and similar surfaces.


This is achieved through the use of chemical cleansing agents in conjunction with high-pressure hot water washing. Abrasive cleaning methods such as grit blasting are avoided as in the majority of cases such methods cause irreversible damage to the surface substrate. The amount of damage will depend on the depth of penetration and will increase where frequently removal occurs.

Our graffiti control system enables us to remove graffiti without damaging the surface substrate by breaking down the graffiti media and drawing their pigments to the surface where they are washed off using high-pressure hot water.

One or both of the following methods may be necessary to achieve a satisfactory result. Even then, it may not be possible for all residues to be removed completely.

 

Standard Method

This can involve up to four stages dependent on the graffiti medium used and the surface on which it is placed. We firstly apply surface specific chemicals to the vandalised area. These are allowed a period to work (dwell time) before being rinsed away. If tracing or ‘ghosting’  survives this procedure ‘ghosting’ chemicals are applied. These are designed to draw more deeply seated deposits to the surface and are rinsed away as before. The surface receives a final rinse down to ensure that all chemical and graffiti residues are removed.

 

Poultice Method

This method is normally required when ghosting or shadowing is very deep seated and can not be removed using our standard method. This is often the case with surfaces such as reconstituted stone, natural stone, certain concretes, marble and delicate masonry materials. Poultices consist of a blend of non-acidic blends of clays and natural earths with medium and surface specific chemical additives and water. These are usually mixed on-site into a thick creamy non-running paste which is then applied to the vandalised area and covered with a plastic film and left to dry. The poultices can usually be removed between 12 and 24 hours later and the area pressure washed. Once graffiti has been removed, surfaces can be treated with Graffishield Anti Graffiti Protection Coatings if required. (For further information please refer to the method statement headed ‘Protective Treatments’).

 

Efflorescence

Because of the potentially volatile nature of natural salts and chemicals present in a variety of masonry substrates, The Shield Group categorically states that it cannot be held responsible for the appearance of any efflorescence or other staining that may occur as a result of the reactivation of such salts and chemicals, during the washing process.

 

Graffiti Removal from painted, plastic, uPVC and similar delicate surfaces.

Once again chemical methods are employed, although the chemicals used are far milder than those used on masonry surfaces. The chemicals are cloth applied and agitated on the affected surface in order to gradually remove the graffiti medium applied. The area is then hand rinsed and the operation repeated as necessary. In many cases, scarring is likely to  remain. This is largely due to the action that the graffiti medium has on the surface and is  especially noticeable where solvent and spirit based media such as marker pens have been used. Painted or wood stained surfaces will often benefit from being redecorated.
Anti Graffiti Protection can be afforded using a range of two-pack polyurethane coatings. (For further information please refer to the method statement headed ‘Protective Treatments’).