What sealants are effective for transformer oil leak prevention?

Effective sealants for transformer oil leak prevention include polyurethane-based sealants, silicone sealants, and epoxy resins. Polyurethane sealants offer excellent adhesion and flexibility, making them suitable for dynamic applications. Silicone sealants provide good resistance to temperature fluctuations and moisture. Epoxy resins create a strong, durable bond and are ideal for structural repairs. When selecting a sealant, ensure it is compatible with transformer oil and can withstand the operational environment.