It’s the industrial-sized, non-aerosol version of the classic WD-40 — the famous multi-purpose lubricant, water displacer, rust penetrant, cleaner, and protectant. Instead of the small aerosol cans most people know, this large blue container holds 20 liters (about 5.3 gallons) of the liquid formula.
These bigger drums are designed for heavy-duty or professional use, like:
• Workshops, garages, or factories
• Soaking rusty parts to loosen them without disassembling