Otis CLP Tubed (.5 Oz) FG-901-T-10 Otis O85 Solvent - 0.5 Oz. Tube The Otis O85 Ultra Bore Solvent is an all-in-one cleaner, lubricant, and preservative. By applying this solvent to your firearm, you are creating a thin film which stops rust and corrosion for long-lasting protection. It penetrates into tight fitting areas for easy disassembly of parts, and seals out moisture with a thin film lubricant reducing surface friction. As a cleaner, the O85 solvent removes carbon, gun powder, dirt and grime from metal surfaces.