Application works shall be carried out at ambient air and substrate temperatures from -15°C to +35°C. The temperature of the structure surface shall be at least 3°C above the dew point. Application of the coating on wet surfaces, as well as on surfaces with traces of frost, ice, or snow, is not permitted.
SPEKTRON SB shall be applied in 2 to 5 coats depending on the required fire protection efficiency group of the coating and the reduced steel thickness. The thickness of the first coat shall not exceed 150 μm (0.15 mm) of dry film thickness; the corresponding wet film thickness shall not exceed 300 μm (0.3 mm). All subsequent coats shall be applied at the recommended dry film thickness of 200–400 μm per coat (achieved by airless spray application; when applied by brush, the coating thickness will be lower and a greater number of coats may be required). The corresponding wet film thickness shall be 400–600 μm and shall be measured using a wet film thickness comb. Significant exceeding of the recommended thickness per coat may result in defects in the dried coating, such as cracking or crater formation.