A brown, jelly-like petroleum-based substance, this corrosion inhibitor is often applied to firearms, machinery, and other metal objects for long-term storage. It creates a barrier against moisture and air, effectively preventing rust and other forms of corrosion. A common example is its use on military surplus firearms, which are often coated with this protective layer before being placed in storage.
The preservative qualities of this material are highly valued, especially in environments prone to high humidity or salt spray. Its widespread use in military applications underscores its effectiveness in preserving valuable equipment for extended periods. Historically, its role in safeguarding weapons and machinery has been crucial, ensuring operational readiness when needed. This preservation has also allowed for the study and appreciation of historical artifacts.