Sentinel 540 Smoke & Odor Dry Fall Coating is a fast-drying water-based coating ideal for odor control projects on exposed ceilings and overhead surfaces in commercial, warehouse, and manufacturing facilities. Sentinel 540 provides good light reflectancy and odor encapsulating and counteracting properties for trapping and covering up smoke and other odors. When sprayed on ceiling heights of 15 feet or more, overspray will dry before reaching the floor and can be vacuumed or swept up.