Liquid key - a dissolving product (penetrant). 455 g. This highly efficient product helps significantly simplify and speed up loosening of rusted and corroded pipe joints, bolts and mechanical units with painted or stuck metal parts. It comprises lubricating components, protecting fasteners from corrosion. Application: Cut the end piece and apply a small amount of the product on the threaded connection. Wait for 1-2 minutes, while the product penetrates into the surface and then disassemble.