How to Use
It is recommended practise to conduct test patches to accurately determine consumption and check for compatibility with the substrate, thereby avoiding any unwanted colour change to the substrate.
The surface of the stone being treated must be clean and dry. Dirt, stains, algae, moss, mould and mildew or pre-treatment chemicals such as release oils must be thoroughly removed in order to avoid possible and unwanted interactions. Any water absorbed by the stone during the cleaning process must be allowed to dry thoroughly before application. Cracks, gaps and flawed joints must be properly repaired. Freshly applied repair mortar should be allowed to cure and the surface must be dry.
Adjacent surfaces such as windows, painted or unpainted surfaces, glass, plants and soil that should not come into contact with Graffiti-Seal should be covered with appropriate materials (plastic or cloth) to protect them from overspray and run-off.
In order to minimise possible darkening of certain building materials, we recommend that these are treated with Graffiti-Prime before applying Graffiti-Seal.
In the case of polished or honed surfaces including marble and granite, it is not necessary to apply more than one coat of Graffiti-Seal. The treatment of these substrates should be done by polishing the Graffiti-Seal into the stone using cloth or microfiber glove.
Graffiti-Seal is a ready-to-use product.
Best results will be achieved using HVLP (High Volume Low Pressure) spraying equipment. Because of their low atomising pressure of no more than 0.7 bar/10psi, these reduced-overspray high-performance sprayers produce far less spray mist but have high material ejection rate. The low internal nozzle pressure reduces the rebound of paint droplets from the object. HVLP spray-guns produce a fine, soft and homogenous spray that permits a broad and uniform material application. Graffiti-Seal is particularly easy to handle with nozzle sizes from 1.3mm to 1.5mm.
The first application should be carried out from bottom to top to prevent run off, and in one stroke to prevent overlapping. Large drops should be rubbed away with a brush. Water beading effect will develop within a few minutes.
Additional applications are required to provide permanent protection against graffiti. The surface must dry completely between each step. HVLP systems are also the best way apply subsequent coats of the product. A fine coating of liquid droplets will form on the surface. This must be rubbed in with a large brush as quickly as possible before the droplets can dry. Care must be taken to ensure that the impregnation is distributed uniformly (i.e. the surface should be uniformly wetted, the surface should appear bright and wet) The next coat can be applied as soon as the surface of the preceding coat has been dried. The drying times required vary between 10 minutes and one hour depending on the weather.