Universal Primer “Uni Grunt” PR2 by Bayris

Universal Primer “Uni Grunt” PR2 by Bayris is a universal acrylic water-dispersion primer designed for the preparation of all types of mineral surfaces with high water absorption (lightweight concrete, plaster, gypsum and brick surfaces, etc.) before filling, painting, wallpapering, tile fixing and other plastering and decorating works. Recommended for equalising substrate absorbency and improving the adhesion strength of decorative materials to mineral surfaces. Universal Primer “Uni Grunt” by Bayris is suitable for both interior and exterior applications.

Universal Primer “Uni Grunt” by Bayris is supplied ready for use, free from strong odours and toxic substances. Equalises substrate absorbency and reduces the consumption of subsequent decorative and protective materials. After drying, forms a transparent film that does not hinder vapour permeability.

Surface preparation shall be carried out in accordance with applicable construction standards. The substrate must be visually clean, dry and free from loose particles. If necessary, clean from dirt, dust, grease, traces of biological contamination, residues of oil-based and lime paints, etc.

Apply at substrate and ambient temperatures between +5 °C and +30 °C (avoiding direct sunlight) and relative humidity between 50% and 80%. Do not dilute with water. Before use, thoroughly mix Universal Primer “Uni Grunt” by Bayris. Apply in a continuous and even layer using the “wet-on-wet” method with a brush, masonry brush, roller or spray equipment until the substrate is fully saturated. Immediately after completion of priming, clean tools with water. Further finishing works may be carried out after 4–6 hours.

Attention! Any modification to the ready-to-use product, use outside its intended purpose and/or failure to follow the manufacturer’s instructions may significantly affect its performance characteristics. Suitability of the product for specific materials and/or compatibility with other materials must be determined by the user through trial application. The manufacturer accepts no liability for direct or indirect damage caused by the use of the product, as it is unable to control all application conditions.

Approximately 0.2–0.3 L/m² per coat depending on the type of surface, substrate absorbency, application technology and tools used.

Avoid direct contact with skin and eyes. In case of contact, rinse thoroughly with plenty of water. Seek medical advice if necessary. Construction waste must not be disposed of in general household waste containers. Dispose of waste in accordance with applicable waste management regulations. Containers and liquid material residues should be taken to authorised hazardous waste collection facilities.

The VOC content of Universal Primer “Uni Grunt” PR2 by Bayris complies with the requirements of VOC emission regulations for subcategory “8”: binding primers, with a limit value of up to 30 g/L. The actual VOC content in the ready-to-use product does not exceed 5 g/L.