What should you apply to a rusted nut to make it easier to loosen?

Applying a lubricant to a rusted nut is an effective method to facilitate loosening it. Lubricants are designed to reduce friction and provide a barrier that helps to break down rust or corrosion that may have built up over time. When sprayed or applied directly to the rusted nut, the lubricant penetrates the debris, making it easier for tools to grip and turn the nut without requiring excessive force.

This method not only aids in loosening the nut more efficiently but also minimizes the risk of damaging the nut or bolt, which can happen if excessive force is applied without lubrication. While applying heat can also be helpful in loosening rusted components by expanding the metal, it requires careful handling and can pose safety risks. Water can potentially exacerbate rust issues by encouraging further corrosion. Soap, while it may act as a mild lubricant, is not specifically formulated for this purpose and is generally less effective compared to commercial lubricants designed for loosening rusted components.