Linoleum is generally resistant to dilute acids, oils, greases and most common organic solvents. However, it is susceptible to damage from prolonged exposure to alkalis (bases). Vinyls are generally resistant to alkalis, acids, alcohols, oils, greases and aliphatic hydrocarbons. They can be softened by ketones, esters and chlorinated and aromatic hydrocarbons. If any particular chemicals or substances are going to be present in the environment, adequate testing should be performed on the floor covering material in advance to ensure suitability for such applications. On floors where polish is recommended, tests should be made on polished samples. High quality commercial floor polish will provide a good barrier to most stains and reagents.