Hi guys, I have come across a 3/4 full bottle of breakfree CLP that I purchased as a teenager in the early eighties, so it would be at least 30 years old. I used to use it at the time on my air rifles. I was wondering if Breakfree has a usable shelf life. It contains PTFE particles in suspension and needs a good shake before use but I wonder if its effectiveness diminishes with time. As far as I recall this stuff used to be one of the best products on the market at the time.
I have many other modern cleaning and lubricating oils but just wondered if this oil would still be effective for use on shotguns and firearms.
Your views would be appreciated.