Cleans Soot, Smoke, Grease & Tar Stains - 500ml. GLEAN Limestone Cleaner allows you too gently remove smoke, soot and tar stains caused by wood, coal and gas fires on all types of natural stone. Effortlessly restore the natural beauty of your stone surfaces with Glean Limestone Cleaner Spray. This 500ml spray gently yet effectively removes smoke, soot, and tar stains from all types of natural stone, caused by wood, coal, and gas fires. Its residue-free formula leaves a long-lasting, clean finish.