A proper car wash starts long before the shampoo and wash mitt.
Prewash is an important part of the process as a pre-step because it helps remove accumulated contamination before contact washing. This is especially important for vehicles with ceramic coatings, PPF films, and SiO₂ sealants, where choosing the right chemistry is essential.
LUMINUS Korea offers three different prewash products, each with its own purpose:
N-PREWASH – Neutral
L-PREWASH 2.0 – Alkaline
S-PREWASH 2.0 – Acidic
N-PREWASH – For Regular Maintenance
N-PREWASH is the neutral prewash in the LUMINUS range.
It is suitable for regular maintenance washing when the vehicle is lightly to moderately soiled and a more aggressive approach is not necessary.
For a vehicle with a ceramic coating, PPF, or SiO₂ sealant, this is the logical choice for regular maintenance when used at the correct dilution and according to the manufacturer's instructions.
L-PREWASH 2.0 – For Heavy Contamination
L-PREWASH 2.0 is the alkaline prewash from LUMINUS.
It is designed for heavier road and organic contamination – traffic film, oily buildup, insects, and other contaminants that we do not want to scrub directly with a wash mitt.
L-PREWASH 2.0 is particularly useful when the vehicle has not been washed for some time or has been exposed to harsh road conditions.
When used on protected vehicles, it should be used at the correct dilution and according to the recommendations for the specific coating or film.
S-PREWASH 2.0 – For Minerals and Water Spots
S-PREWASH 2.0 is the acidic prewash from LUMINUS.
It has a different purpose – it is designed to target mineral deposits and water spots, which can build up on the surface and affect water behavior.
This is particularly interesting for
On vehicles with ceramic coatings and SiO₂ protections, sometimes reduced beading does not mean that the protection has disappeared. Mineral deposits may have accumulated on top of the protection. In such a situation, a properly selected acidic prewash can help restore the surface behavior.
Which LUMINUS Prewash Should You Choose?
| Product | Type | Main Purpose |
|---|---|---|
| N-PREWASH | Neutral | Regular maintenance |
| L-PREWASH 2.0 | Alkaline | Heavy road and organic contamination |
| S-PREWASH 2.0 | Acidic | Minerals and water spots |
How Do They Perform on Protected Vehicles?
The following table is a practical guideline, not an official LUMINUS classification. Actual compatibility depends on the specific coating or film, dilution, dwell time, and method of application.
| Product | Ceramic Coating | PPF | SiO₂ Sealant |
|---|---|---|---|
| N-PREWASH | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| L-PREWASH 2.0 | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ |
| S-PREWASH 2.0 | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ |
How Should We Read the Table?
N-PREWASH is the most conservative choice for regular maintenance washing.
L-PREWASH 2.0 provides stronger cleaning power and is designed for heavy road and organic contamination.
S-PREWASH 2.0 has a different role – it is used when the main problem is mineral deposits and water spots.
It is important not to interpret the stars as meaning "stronger" or "weaker" product. They indicate how suitable the product is as a choice for a particular protected surface when used correctly.
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