(1 brand is Chimney RX Brushable Crown Repair; bought because of the gallon at saversystems.com) Deal with all the crown and then sleek it with a paintbrush (Photograph two). Wait till the sealer dries tacky to the contact, then apply a second coat with a brush. Clean up with water. https://chimneycleaningnearme05936.develop-blog.com/34194736/little-known-facts-about-natural-gas-fireplace