**Overview** The Heavy Duty Two-Step Bundle provides an industrial-strength cleaning system designed for severe inorganic buildup followed by heavy organic contamination. Built for construction fleets, waste vehicles, tankers, and high-soil commercial equipment, this system delivers maximum cleaning power for the toughest conditions. **What’s Included** **HD-S1 Heavy Duty Step One – Industrial Acid Pre-Soak & Inorganic Soil Remover (20 L)** A powerful acid-based cleaner engineered to dissolve oxidation, mineral deposits, bonded road film, and severe inorganic buildup. Not safe for polished or sensitive metals. **HD-S2 Heavy Duty Step Two – Industrial Alkaline Organic Soil & Grease Remover (20 L)** A high-strength caustic cleaner designed to remove oils, grease, soot, proteins, and organic grime as the second stage of the two-step process. **Key Benefits** - Aggressive cleaning power for industrial and heavily soiled vehicles - Attacks both inorganic buildup (Step One) and organic contamination (Step Two) - Restores dull, weathered, and neglected fleet surfaces - Greatly reduces manual scrubbing in high-soil environments - Works exceptionally well with pressure washers and hot water units - Built for heavy-duty commercial, industrial, and municipal use **Dilution Instructions** *HD-S1 Heavy Duty Step One* - General cleaning: 50 mL per 4 L - Normal soil: 100 mL per 4 L - Heavy soil: 200 mL per 4 L - Severe buildup: 500 mL per 4 L *HD-S2 Heavy Duty Step Two* - General cleaning: 50 mL per 4 L - Normal soil: 100 mL per 4 L - Heavy soil: 200 mL per 4 L - Difficult organic buildup: 500 mL per 4 L **Application / Use** *Heavy Duty Step One (HD-S1)* 1. Apply bottom-to-top or evenly across surfaces. 2. Do not allow product to dry. 3. Follow immediately with Step Two. *Heavy Duty Step Two (HD-S2)* 1. Apply directly over the Step One solution while still wet. 2. Allow a brief dwell time. 3. Rinse thoroughly with a pressure washer or hot water wash system. **Ideal For** - Transport fleets and long-haul trucks - Construction vehicles and equipment - Waste vehicles and municipal fleets - Tankers and industrial service trucks - High-mileage or neglected equipment with extreme buildup - Operations requiring maximum cleaning power **Professional Use Warning** Both products are professional-grade cleaners. Always use proper PPE and avoid contact with polished metals or sensitive surfaces. **Safety & SDS** Use appropriate PPE when handling chemical products. SDS documents are available in our library.
