Storage and disposal of industrial waste has become a great challenge in the recent years. Waste from metal casting industries (foundry waste) is one such waste which need more land area and cost for storage and maintenance. The current study focusses on improving the properties of red soil which is available abundantly in India, by adding foundry fines to propose an alternative material to clay as a landfill liner material. A series of laboratory experiments are conducted to understand the changes in properties of red soil in terms of consistency limits and other geotechnical properties with the addition of foundry fines at different proportions: 10, 20 and 30% by weight of red soil. The results from the experiments shown an improvement in the geotechnical properties of red soil that are needed for a landfill liner material. The improved properties were compared with the requirements given by environmental protection agency (EPA) guidelines from different countries, and the properties of red soil and foundry fines mixtures are falling within the guidelines suggested by UK Environmental Agency. The optimum percentage of foundry fines needed to improve red soil properties to satisfy liner requirements is found to be 30 percent by weight of red soil.