Licensed Biocides - Stone Sills/Pier Caps

For sills and pier caps, our licensed biocides provide reliable protection against algae, lichen, and other organic growth, helping to maintain a clean, well-kept appearance. When applying biocide to painted or dense masonry, we recommend rinsing off the biocide after one hour. This method achieves an initial kill of biofilm but does not offer lasting protection, as biocides cannot penetrate sealed finishes and may remain active on the surface if left unrinsed.

In colder conditions, BioClear 50 Pro is recommended due to its solvent component, which boosts performance in low temperatures, making it suitable for year-round maintenance of sills and pier caps. To ensure a safe and compliant application, carefully follow product instructions, use appropriate PPE, and manage runoff to prevent contamination of surrounding areas. With PureSeal’s licensed biocides, professionals can achieve effective results on sills and pier caps, with attention to the specific needs of sealed finishes.