The roofing contractors dream. Asbestos Roof coatings and Asbestos Roof Paints developed for minimal disruption when being applied. Designed for speed and efficiency by not needing disruptive high pressure washing. The asbestos Roof sealer penetrates lichen and friable surfaces to bond it all together before spray applied asbestos roof coating top coat. 10 year manufacturer warranty and been in use for 20 years.