Cavity Coater is the perfect solution for hard-to-reach areas that are prone to rusting! Cavity Coater is a single step super-penetrating corrosion inhibiting coating designed for long term protection on all metal surfaces. Cavity Coater provides a self-healing film which provides incredible rust protection on hard to reach areas. A reusable 48" spray hose with a 360 degree nozzle is available separately. Refer to part # KB75015. Cavity Coater is ideal for internal cavities that are rusty. Cavity Coater will stop the rust and prevent it from getting any worse by isolating the cavity surface from the elements.Cavity Coater can be sprayed into the back side of the fuse and relay panels under the hood to prevent moisture from causing corrosion in the connections.