In many cases, transformer oil leakage is caused by the failure of sealing parts, such as worn-out or damaged seals. At this point, it's advisable to use high-quality sealing adhesives for sealing treatment. First, remove the old sealing pad at the leakage site, clean the sealing surface thoroughly, ensuring it is flat, oil-free, and free of impurities. Then, select the appropriate sealing adhesive, such as oil-resistant, high-temperature-resistant, and aging-resistant silicone sealant, and apply it evenly on the sealing surface. Next, install a new sealing pad and secure it tightly using bolts or similar methods to ensure a good seal and prevent oil leakage.