Zep Professional: Z-Works Rapid Penetrant & Lubricant 24 oz. Multi-purpose, fast-acting aerosol penetrant and lubricant that effectively displaces water. Applies to surface as yellow foam to ensure even application and adequate contact time. Silicone formulation prevents corrosion. Loosens frozen bolts, Penetrates and lubricates Foaming formulation to assure proper application and contact time