Properly storing lubricants is important to protect them from all sources of contamination and excessive heat and cold which can lead to degradation. They should be stored inside, when possible, where it is clean and dry. Storing lubricants outside is not recommended because of the following
1. Water will enter the drum around the bungs and contaminate the product if drums are left standing on end. Water collects on the top of the drum and is pulled in (this is referred to as breathing) due to the rising and falling of the ambient temperature even though the bung is sealed.
2. Extreme heat and cold can alter physical properties in some lubricant products. Quarts and pails also have a tendency to breathe.
3. Drum markings and/or identification may fade and become unreadable making the product unusable, or resulting in product misapplication.
4. Dirt and rust can accumulate inside the chime of the drum and contaminate the product when opened.
5. Rust can develop inside the drum if water leaks in and contamination occurs..