Cemesto is a sturdy, lightweight, waterproof and fire-resistant composite building material made from a core of sugarcane fiber insulating board, called Celotex, surfaced on both sides with asbestos cement. It was originally developed by the Celotex Corporation and first introduced to the market in 1931.[1]
Cemesto was a pivotal material in the development of World War II-era defense housing, which provided homes for workers mobilized to meet wartime production needs.[2]