Primer filler PX 07 – surface darkening prevention
Primer filler for antigraffiti coatings
PX 07 is a single-component, colourlessly drying dispersion of styrene-acrylic copolymer. It is used for priming absorptive, mineral substrates before application of anti-graffiti coating, which minimises or prevents the covered surface form darkening. It also enhances and evens out its absorptiveness. The product perfectly penetrates into the surface while improving its adhesive properties thanks to small size dispersion particles. PX 07 allows diffusion, has hydrophobic properties, protects the surface from penetration by hazardous substances and is UV and erosion resistant.
Product key qualities:
prevents colour deepening or changes,
strengthens the surface, paint layers, vulnerable natural stone substrates,
stabilises and evens out absorptiveness of all absorptive substrates,
improves paint adhesion to the surface and the coating durability,
improves surface coatings application rate,
ensures perfect adhesion to various mineral substrates,
We present an example of how the PX 07 primer works on concrete surface with different levels of absorbency. As the absorbency of the surface increases, the intensity of the darkening of its color increases after applying the anti-graffiti coating. PX 07 significantly reduces this phenomenon.
Substrate with low absorbency:
Substrate with high absorbency:
Technical data on application
Coating durability amounts to 5 years.
On drying, the primer constitutes a transparent film, hardly visible or entirely invisible depending on the surface type, amount of sunlight and incidence angle. The product shows lack of significant reduction in water vapour diffusion, UV resistance, resistance to alkalis, dries without becoming sticky. Hydrophobic protection after 5 hours.
Areas for application
PX 07 can be used both on smooth and porous absorptive substrates. Thanks to extremely small particle size it can be recommended for most absorptive mineral substrates such as: concrete, cement, mortar, plaster boards, brick, clinker and natural stone e.g. sandstone, travertine and granite. The product is highly resistant to alkalis so it can be applied on cement or cement-lime mortar. It can also be used prior to application of other paint coats. Due to the variety of covered substrates it is advisable to test the product's reaction with the surface first, before its actual application.
After opening the container stir all the contents thoroughly. On pouring out a suitable portion, close the lid firmly to prevent water from vaporising and a film from forming on the surface. The temperature of the air and surface during primer application: 5-30°C. Relative air humidity must not exceed 90%. The temperature must be stable and remain within the appropriate range throughout the drying period. The product must be applied thoroughly, filling all cracks and irregularities in the surface. Negligence may result in the surface darkening, which can be visible after application of the anti-graffiti coating.
The product can be applied in one or two layers, depending on the surface: very absorptive substrates (e.g. sandstone) should be painted twice, while substrates with low absorptiveness, such as granite, can be painted once.
Allow for about 4 hours' break between applying the first and second layers at the temperature of 20°C. All layers should be applied in one working cycle. Anti-graffiti coating can be applied after approx. 24 hrs. If streaks or splatters appear, they should be smoothened with a roller before drying. The product can be applied with a pneumatic spraying gun or hydrodynamic 12-17 nozzle or with regular painting tools such as rollers or brushes. It can be used in air-conditioned spaces.
On absorptive substrates, two layers is the optimum application.
Theoretical application rate: 8,3 m²/L (120 ml/m²) up to 16,5 m²/L (60 ml/m²)
Theoretical application rate refers to approximate values indicating extreme consumption amounts which differ according to the type of surface the product is applied to.
Approx. 8,3 m²/L (120 ml/m²) per two layers, e.g. sandstone, concrete.
Consumption may increase on absorptive substrates.
Mildly absorptive substrates:
Approx. 16,5 m²/L (60 ml/m²) per one layer, e.g. granite.