Yellow Chemical absorbents are also hydrophilic and will absorb both oil- and water-based fluids at the same time. The yellow colour of these absorbents indicates that they should be used for recovering aggressive fluids such as acids and alkalis and once used should be treated and disposed of with extreme caution. In most instances white Oil only absorbents will be best suited to the vast majority of tasks involved in oil and gas refining, transportation and distribution. For vehicle fleet management, fuelling and servicing, Oil Only absorbents will provide the better option here too. For more generic building maintenance and cleaning grey Maintenance absorbents will cover the tasks at hand. For any aggressive spills like acids or alkalis yellow Chemical absorbents should be the default choice