Dibutyl Methylenebis(thioglycolate) is primarily used as a plasticizer in the polymer industry, particularly for PVC and other vinyl resins. It enhances the flexibility, durability, and workability of these materials, making them suitable for applications such as cables, flooring, and synthetic leather. Additionally, it acts as a stabilizer in certain formulations, helping to prevent degradation caused by heat or light. Its compatibility with various polymers also makes it useful in adhesives and sealants, improving their performance and longevity. In the rubber industry, it serves as a vulcanization accelerator, aiding in the curing process to produce high-quality rubber products.