To investigate the influence of coating characteristics and ambient temperature on radon reduction efficiency, four types of coatings were selected for systematic testing at various ambient temperatures. The experimental results showed that the coating's solid content significantly affected its performance. The coatings exhibited the following descending order of radon suppression efficiency: waterborne polyurethane coating > oily polyurethane coating > oily inorganic zinc-rich coating > waterborne acrylate coating. Their thermal stability also varied significantly. Waterborne polyurethane coatings demonstrate optimal thermal stability, with merely a 2.4 % fluctuation in efficiency. Furthermore, a notable difference in thermal stability was observed between water-based and oil-based polyurethane coatings.
Li et al. (Tue,) studied this question.