**Key Benefits**
- Aggressive cleaning action for severe inorganic soils and oxidation
- Breaks down bonded film, mineral deposits, and weathered buildup
- Prepares surfaces for the Step Two alkaline wash
- Helps restore dull or neglected fleet surfaces
- Performs extremely well with pressure washers and hot water units
- Designed for industrial, commercial, and municipal fleets
**Dilution Instructions**
- General cleaning: 50 mL per 4 L
- Normal soil: 100 mL per 4 L
- Heavy soil: 200 mL per 4 L
- Severe inorganic buildup: 500 mL per 4 L
**Application / Use**
1. Apply bottom-to-top or evenly across all surfaces.
2. Do not allow the product to dry on the surface.
3. Follow immediately with HD-S2 Heavy Duty Step Two while the surface is still wet.
4. Rinse thoroughly using a pressure washer.
**Ideal For**
- Construction trucks and industrial equipment
- Waste vehicles and municipal fleets
- Tankers, transport trucks, and high-mileage units
- Equipment with heavy oxidation and neglected finishes
- Operations requiring strong restoration power
**Professional Use Warning**
HD-S1 is an acid-based industrial cleaner for trained professionals only.
Avoid polished metals, chrome, or sensitive surfaces. Always wear proper PPE.
SDS
