With Blu Torch technology. Frees corroded nuts & bolts. Penetrates rust. Fast-acting. You have a job to do: WD-40 Specialist line helps you get it done! Blu Torch technology is a proprietary blend of ingredients that breaks the bonds of the toughest stuck bolts. Reach for WD-40 Specialist rust release penetrant first to get it off fast. Works fast to free rusted bolts and other stuck parts. The capillary action penetrates into tight crevices, threads, and seams to break the bonds that hold stuck parts together. Helps prevent rust and corrosion from re-forming and leaves behind a lubricating layer. No CFCs. propellant: CO2. WD-40 safety hotline 1-888-324-7596. wd40specialist.com. Please recycle when empty.