- Leaves A Lustrous, Lasting, Protective Film On All Metal, Wood And Plastic Surfaces. The Double-Napped, 100% Cotton Flannel Cloth Is Impregnated With Pure Silicone And Then Packaged In A Convenient Re-Closable Poly Bag, Staying Clean And Moist After Use. Use On Firearms, Sporting Equipment And Precision Instruments To Safely Remove Dust And Corrosive Fingerprints.