Epoxies are highly resistant to water, alkalis and organic solvents.
Although standard epoxies have only a fair resistance to acids and oxidizing agents, they can be formulated for better resistance to these agents. They should be tested before use. Polyester thermosets are avvailable in many formulations. They can be formulated for good to excellent resistance to acids, weak alkalis, and organic solvents. However, they are not recommended for use with strong alkalis.