R-0870 powder

Rick T

Well-known member
Apr 28, 2019
Houston, TX
I bought my first TF-100 last spring. A couple of weeks ago I ordered refills. My old R-0870 powder has darkened. The new powder is lighter. Is my old powder still good to use until gone or should I throw it away and go with the lighter powder (or combine them into 1)?



Aug 16, 2015
Bryan, Texas
Just pulled out my backup .25lb container of R-0870, only to find that the snap top had come loose over winter, and while still ash gray in color, the entire contents of it had solidified into a solid brick due to the exposure to moisture. Is it still usable at this point, or once it has completely solidified is it a lost cause?