This document presents information on the chemical resistance of Thermaflex polyolefin foam insulation, with a focus on the ThermaSmart Marine 4.0 product group. It explains compatibility with various substances, including excellent resistance to acids, alcohols, bases, and esters, good resistance to aldehydes, ketones, and vegetable oils, limited resistance to hydrocarbons, mineral oils, and strong oxidizing agents, and poor resistance to halogenated hydrocarbons. It also notes that thickness, stress, and processing conditions affect final resistance and recommends real-case testing under exposure conditions.