One of CRC's key penetrant products is Knock'er Loose® Penetrating Solvent, an industrial strength, low viscosity lubricant and penetrant designed to quickly loosen and free seized, bound or frozen fasteners. CRC Knock'er Loose® quickly permeates rust, scale, gum, grease & corrosion with a low surface tension formula that creeps into cracks, seams, threads and joints with greater efficacy than the competition. CRC Knock'er Loose® product features & benefits: Specially formulated to dissolve rust, gum & varnish Lubricating residue prevents corrosion from returning Clear formula contains no dyes and leaves no mess 360° Spray Valve can be sprayed from any position