Tec7 GT7 The 7 in One Penetrating Oil. Solves thousands of problems. More than just a penetrating oil GT7 is also a contact spray, moisture repellent, cleaner, lubricant, protector and corrosion resistant spray. Tec7 GT7 displaces moisture from electrical contacts, protects tools and an excellent rust remover. Works by a unique cold shock effect, where it freezes rust so starts working on rust from the very first spray. Cleans Wheels rims, removes ground in tar from your car without harming the paint, great on pneumatic tools and removing grease. Lubricates drive belts, connnections,bicycles. Penetrates quickly and deeply loosening seized bolts etc.