Organic Products F-900 Torque Seal
With F-900 Torque Seal from Organic Products, you'll be able to ‘loosen up' about the torque on your hardware, because this inspection lacquer will let you know when your hardware has loosened up. Available in various colors, this seal will grow brittle and break with any movement or tampering, making it a popular and inexpensive "anti-sabotage lacquer." Use it for nuts, parts, studs, compression fittings and assemblies after they're put in the correct position or given the proper torque. It will adhere to all metals and many other surfaces.