Birchwood Casey MLP Solid Film Lubricant Pen, 0.33 oz. Semi-permanent, lacquer-like coating Meets the performance of Mil-Spec requirements Prevents corrosion, galling, seizing and fretting of internal gun parts Low friction coating Works between -320 and +300 degrees F Semi-permanent, lacquer-like coating Prevents corrosion, galling, seizing and fretting of internal gun parts Low friction coating Works between -320 and +300 degrees F