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Koch-Chemie Green Star dilution ratios (with calculator)

Exterior/engine 1:5–1:30, interior 1:10–1:20, floors 1:40–1:120. Includes the critical VDA Class A note (≤5 minute dwell, max 1:3).

Exterior & engine bayInterior textilesFloor cleaningCustom (open calculator)
Active ratio1:15 (product:water)
Bottle500 mL spray bottle
Open in calculatorJump to presets

Exact amounts (pre-calculated)

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  • Product31.3 mL by volume31.3 g
  • Water468.7 mL by volume468.8 g

Add 31.3 mL Product and 468.7 mL Water to make 500 mL.

Use-case presets

Exterior & engine bay

1:5 (product:water)

Heavy degreasing on engines and exterior plastics – start here, then dilute further as needed.

  • Work panel by panel and rinse before product dries.
500 mL spray bottle
Product: 83.33 mL (2.818 oz)
Water: 416.7 mL (14.09 oz)
1 liter canister
Product: 166.7 mL (5.636 oz)
Water: 833.3 mL (28.18 oz)
32 oz bottle
Product: 157.7 mL (5.333 oz)
Water: 788.6 mL (26.67 oz)
Interior textiles

1:15 (product:water)

Midpoint of the 1:10–1:20 interior range for fabrics and plastics.

  • Extract or wipe residue thoroughly to avoid alkalinity marks.
500 mL spray bottle
Product: 31.25 mL (1.057 oz)
Water: 468.8 mL (15.85 oz)
1 liter canister
Product: 62.5 mL (2.113 oz)
Water: 937.5 mL (31.7 oz)
32 oz bottle
Product: 59.15 mL (2 oz)
Water: 887.2 mL (30 oz)
Floor cleaning

1:80 (product:water)

Mid-range of the 1:40–1:120 guidance for shop floors and industrial surfaces.

  • Scrub and rinse – do not let solution dry without removal.
500 mL spray bottle
Product: 6.173 mL (0.2087 oz)
Water: 493.8 mL (16.7 oz)
1 liter canister
Product: 12.35 mL (0.4175 oz)
Water: 987.7 mL (33.4 oz)
32 oz bottle
Product: 11.68 mL (0.3951 oz)
Water: 934.7 mL (31.6 oz)

Safety and compliance

Do not use on
  • Hot surfaces
  • Surfaces where compatibility has not been checked
PPE
  • Follow the current safety data sheet and workplace PPE requirements.
Notes
  • For VDA Class A use, the manufacturer states a maximum 1:3 product-to-water concentration and five-minute reaction time.
  • Do not let the product dry. Rinse or remove it as directed for the application.
  • VDA Class A: maximum five-minute reaction time at no stronger than 1:3 product-to-water.
MixByParts is not affiliated with Koch-Chemie. Ratios shown are from the manufacturer and authoritative guidelines; always verify on your bottle or TDS for your exact SKU.

Sources & verification

FAQ

Which Green Star dilution should I use?

The manufacturer lists 1 part Green Star to 5–30 parts water for exteriors and engines, 1:10–1:20 for interiors and textiles, and 1:40–1:120 for workshop and industrial floors. Select within the applicable range for the task and soil level.

What does the VDA Class A note mean?

It limits maximum strength to 1:3 and dwell time to five minutes on sensitive automotive finishes. Always rinse before the dwell limit.

Is Green Star safe on floor sealants?

The manufacturer supports workshop and industrial floor cleaning at 1:40–1:120 but does not guarantee compatibility with every coating or sealant. Test suitability and compatibility before use and do not let the product dry.

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