Description

STR-4075 Vehicle Pre-Soak is an industrial-grade surface penetrator designed for use before vehicle washing to loosen stubborn contaminants like bugs, grease, road grime, tar, and oil film. Applied during the pre-wash stage, it significantly reduces manual scrubbing and improves final wash results.

The formula is phosphate-free and compliant with AQMD Rule 102, containing zero VOCs and no smog-contributing ingredients. It is safe on fine finishes, including painted surfaces, aluminum, glass, plastic, and polished metal. With a powerful citrus-based detergent blend and high-foaming action, STR-4075 is engineered for professional vehicle wash bays, large transportation fleets, and auto detailers.


Application Areas
  • Truck, bus, and trailer wash facilities

  • Car wash tunnels and automatic systems

  • Vehicle maintenance depots and repair shops

  • Public transportation cleaning (buses, shuttles, trams)

  • Auto detailing centers

  • Pre-treatment before foaming vehicle shampoo


Directions for Use
  1. Dilution Ratio: 1:60 (5 gallons makes 305 gallons)

  2. For heavy soil, dilute at 1:40

  3. Apply from bottom to top before vehicle wash

  4. Let soak for 1–2 minutes to penetrate grime

  5. Do not allow product to dry on the surface

  6. Follow with standard vehicle wash detergent and rinse thoroughly top to bottom

Note: Industrial use only. Use appropriate PPE (gloves, goggles). Avoid contact with skin and eyes.


Technical Specifications
Specification Value
Appearance Blue liquid
Fragrance Citrus
pH (Concentrate) 12.8
pH (Diluted 1:60) 10.2
Foaming Level 5 – High foam
Hard Water Compatibility 4 – Good
VOC Content 0%
Biodegradability Readily biodegradable
Flammability Non-flammable

Storage Conditions
  • Store in a cool, dry, and ventilated area

  • Protect from freezing and direct sunlight

  • Keep tightly sealed between +5°C to +30°C (41°F to 86°F)

  • Avoid mixing with acids or oxidizers

  • Keep out of children’s reach


Packaging Information
  • 5 L HDPE Canister

  • 20 L HDPE Canister