Abstract: An aircraft insulating foam includes a base foam and a coating. The base foam is an open celled foam with a plurality of interconnected open cells. The interconnected open cells and the outside of the base foam define a surface area. The coating is deposited on the surface area. The coating includes a water repellant material and a fire resistant material. The aircraft insulating foam may be made by providing a base foam having a plurality of interconnected open cells, providing a coating including a water repellant material and a fire resistant material, and depositing the coating upon the surface area of the provided base foam.