Penetrating oil is a commonly used antirust lubricant, consisting of a lubricant with low surface tension, which has a strong affinity for metals, and can be used as an antirust oil and a light lubricant. Conventional penetrating oil is composed of petroleum distillates and rust inhibitors, etc. They are non-degradable and harmful to the environment and human body. However, the bio-based penetrating lubricant has developed in recent years. It is a kind of metal maintenance oils (BPL), made up of a combination of additives and bio-based oils. They are environmentally friendly and non-toxic. Because bio-based oils have an ultra-high viscosity index, their natural oil film provides better lubrication and anti-corrosion properties than petroleum-based lubricants. They can be used widely in many applications instead of petroleum-based products. https://www.7cfindustries.com/products/penetrating-oil/