Foam has become a popular sculptural medium for festivals, theater, and temporary installations, but outdoors it faces serious challenges. Sunlight degrades polymers, rain and snow infiltrate its cellular structure, and temperature swings accelerate damage. Unlike marble or bronze, foam cannot endure decades of weather without coatings, reinforcements, and constant care. Yet, with protective shells, armatures, and innovative finishes, artists can extend its lifespan for short-term outdoor displays. This article explores foam’s vulnerabilities, real-world case studies, and strategies for preservation—helping sculptors balance creativity, practicality, and the impermanence of art in the open air.