I use this product to coat my pipes to prevent burning on softer woods like pears. IMHO it works like a charm. I had a couple of pear and briar wood pipes that were starting to burn through and I applied a layer around the bowl with my finger and let it dry for 24 hours. Sometimes I applied a second coat to fill burn holes or when the shell was badly cracked or starting to burn through. Since then no problems. I don't feel it when I smoke.