SONAX PROFILINE MultiClean "Acid" Power Cleaner (Acidic) 5000ml

Acidic Power Cleaner for Stubborn Mineral Deposits — SONAX PROFILINE MultiClean Acid

What does SONAX PROFILINE MultiClean Acid achieve? This acidic power cleaner chemically dissolves limescale, rust, cement film, and mineral contaminants — as a highly concentrated basic cleaner for professional detailing and car washing. 5-liter container for professional use.

In detailing and professional vehicle preparation, there are contaminants that cannot be effectively removed with either alkaline cleaners or mechanical scrubbing — mineral deposits such as limescale, cement, rust, and hard water stains are chemically bound and require an acidic counteraction. SONAX PROFILINE MultiClean Acid is the highly concentrated acidic power cleaner in the PROFILINE system: specially formulated for the effective dissolution of lime and mineral-based contaminants on rims, vehicle surfaces, undercarriages, and hard industrial surfaces. As a 5-liter concentrate with flexible dilution, it is the economical tool for regular professional use in detailing shops and car washes.

• Highly concentrated acidic power cleaner for mineral contaminants. Limescale, rust, cement film, and hard water stains are alkaline or metallic compounds — an acidic formulation reacts with these deposits, converting them into water-soluble ions that can be easily rinsed off. MultiClean Acid is strong enough to effectively dissolve even stubborn dried limescale deposits and rust marks without intensive mechanical scrubbing.
• Flexibly dilutable for various cleaning tasks. The concentrate allows adaptation to different degrees of contamination by targeted dilution with water — from light limescale stains (high dilution) to heavy cement and rust deposits (low or no dilution). This flexibility makes the power cleaner a universal tool, suitable for many different professional cleaning tasks with a single product.
• Economical 5-liter container for regular professional use. The 5-liter concentrate is designed for continuous professional use: In detailing shops, car washes, and detailing studios, where several vehicles with different contamination profiles are cleaned daily, the bulk container is significantly more cost-effective than smaller individual bottles. Depending on the dilution ratio, several liters of ready-to-use cleaning solution can be produced per liter of concentrate.

Practical Tip from Detailing1: Always use the acidic power cleaner diluted if the surface allows it — undiluted use should only be for very stubborn stains and on acid-resistant surfaces. On painted surfaces, only apply for a short period and rinse with plenty of water — acidic cleaners can attack clear coat and delicate surfaces if left on for too long. Protective equipment (gloves, safety glasses) is mandatory when handling acidic concentrates. As a systemic counterpart, we recommend SONAX PROFILINE MultiClean Alkaline for grease and dirt-related contamination — together, both power cleaners cover the entire pH spectrum of professional vehicle cleaning.

Acidic Chemistry in Power Cleaners — How MultiClean Acid Dissolves Mineral Contaminants

The active principle of the acidic power cleaner is based on the acid-base reaction: Mineral deposits such as calcium carbonate (limescale) and iron oxides (rust) are chemically basic or metallically bound. An acidic cleaner converts these compounds into their ionic form by donating protons — calcium carbonate becomes calcium ions (Ca²⁺) and carbon dioxide (CO₂), iron oxides become soluble iron ions. This is exactly the opposite of the original chemical bond and makes the deposits water-soluble and rinsable, without the need for mechanical force.

The strength of the acid in the concentrate is chosen to be effective enough to completely dissolve typical limescale and rust deposits within a reasonable contact time — and at the same time, through controlled dilution, it can be safely used on more sensitive substrates. This makes MultiClean Acid more versatile than specialized individual products formulated only for a specific type of contamination and a particular surface. The concentrate offers excellent value for money in professional use due to its versatility and dilutability.

An important chemical aspect of acidic cleaners is compatibility with various materials. Acid-resistant materials such as stainless steel, ceramics, glass, and many plastics are fully compatible with acidic cleaners. Aluminum and certain light metal alloys, on the other hand, react sensitively — acids can attack aluminum and cause it to become permanently dull or create an oxidative film. Painted surfaces are tolerant with short contact times and sufficient rinsing, but clear coat damage can occur with prolonged contact times or high concentrations. Adherence to recommended contact times and dilutions is therefore not optional, but a fundamental part of safe application.

Correct Application of MultiClean Acid — Dilution, Contact Time, and Workflow

Applying the acidic power cleaner requires precise procedures and a dilution rate adapted to the degree of contamination and the surface. For light limescale stains and regular rim cleaning, a dilution of 1:10 to 1:20 (1 part concentrate to 10–20 parts water) is recommended. For medium contamination such as cement film or heavier limescale deposits on tiles and hard surfaces, 1:5 to 1:10. For heavy deposits such as long-dried rust or massive limescale infestation, a dilution of 1:2 to 1:5 or undiluted application may be necessary — here, increased caution is required, and contact with sensitive materials should be avoided.

Workflow: Moisten the surface with water beforehand to increase the porosity of the substrate and slow down the runoff of the cleaner. Apply the diluted MultiClean Acid generously — spray directly onto horizontal surfaces, apply with a sponge or brush onto vertical surfaces. Contact time 1–5 minutes, depending on the degree of contamination and dilution rate — visible foaming or bubbling reaction during the contact time is a sign that the acid is reacting with the mineral deposits and dissolving them. After the contact time, rinse thoroughly with plenty of water — completely remove rinse water and residues of the acidic cleaner, especially on metal surfaces, which can corrode if acid residues remain.

After cleaning with the acidic power cleaner, it is recommended to rinse with a neutral or slightly alkaline solution to completely neutralize any acid residues — especially on rims and metal surfaces that are also to be sealed or cared for after cleaning. For freshly cleaned rims, SONAX PROFILINE CeramicCoating "CC" Rim is suitable as a durable protection that significantly slows down future limescale and brake dust deposits and facilitates subsequent cleaning.

Areas of Application — Typical Contaminants and Surfaces for the Acidic Power Cleaner

The acidic professional power cleaner covers a wide range of applications where mineral or acid-soluble contaminants are the main problem. Rim cleaning is one of the most common areas of application: While brake dust does not have a direct affinity for acidic cleaners, limescale deposits from wash water and mineral coatings on rim surfaces are effectively dissolved by the acidic power cleaner. On steel rims and stainless steel rims, use is problem-free — on aluminum rims with increased acid sensitivity, the dilution should be increased and the contact time shortened.

Cement film on vehicles and glass surfaces is a common problem for vehicles used near construction sites or during road construction. The white, hard film of cement dust that settles on paint and glass is alkaline and is effectively dissolved by the acidic power cleaner — on glass surfaces (e.g., windshield), application with sufficient rinse water is problem-free and leaves a clear, clean pane. Mineral water spots and limescale rings caused by well water or highly calciferous wash waters are also a classic area of application — MultiClean Acid is the more concentrated professional tool in this segment compared to the SONAX PROFILINE Waterspot Remover designed for individual care.

In the area of vehicle underbody cleaning, the acidic power cleaner is effective against limescale and mineral deposits that settle in the underbody — however, combining it with an alkaline pre-cleaner for grease and oil-based contaminants is useful before the acidic cleaner is used for mineral components. Workshop floors, lifting platforms, and sanitary facilities in detailing shops, where limescale and mineral deposits build up, can also be effectively cleaned with the diluted power cleaner — an economical dual use of the large 5-liter container.

Acidic vs. Alkaline Power Cleaner — The Right Choice for Every Type of Contamination

The SONAX PROFILINE MultiClean system consists of two complementary power cleaners that together cover the entire spectrum of professional vehicle and surface cleaning. SONAX PROFILINE MultiClean Alkaline is the alkaline pre-cleaner for grease, oil, and dirt-related contamination — road film, insects, tar, tire abrasion, and organic adhesions are effectively dissolved by the alkaline formulation. MultiClean Acid, on the other hand, is designed for the complementary cleaning area: mineral, calcareous, and rust-related deposits that do not react to alkaline cleaners.

The rule of thumb: Alkaline cleaner first (road film, grease, organic dirt), acidic cleaner in the second step (limescale, rust, mineral deposits). In practice, many vehicle contaminations are of a mixed nature — a dirty wheel contains both brake dust (metallic/oxidic), road film (organic), and limescale deposits (mineral). The optimal cleaning result is achieved by sequential application of both cleaners: Alkaline for the initial coarse dirt, Acid for the remaining mineral residues.

Compared to specialized individual products like rim cleaners or descalers, the MultiClean concentrates offer the economic advantage of flexibility: one product, adjustable by dilution, for many different cleaning intensities and surfaces. For detailing shops with different customer vehicles and varying contamination profiles, the systematic MultiClean duo is more economical than a variety of specific individual products — and at the same time significantly reduces storage effort.

Buying SONAX PROFILINE MultiClean Acid — Container Size and Usage Calculation

The SONAX PROFILINE MultiClean Acid is exclusively available in a 5-liter container, clearly positioning it as a professional product: The container size and concentrate format are designed for continuous professional use, not for occasional private use. At a dilution of 1:10, 5 liters of concentrate yield 50 liters of ready-to-use cleaner — enough for hundreds of rim cleanings or dozens of full vehicle detailings with limescale removal. Even at dilutions of 1:5 for heavier contamination, the container lasts for many cleaning operations.

For professional detailing shops that clean several vehicles daily and regularly encounter mineral contamination, the 5-liter concentrate is the most economical purchasing decision. The price per liter of ready-to-use cleaner is significantly below the market price for ready-diluted cleaners in consumer containers, depending on the dilution ratio. The investment in the concentrate typically pays off after just a few weeks of regular use compared to using individual ready-to-use cleaners.

As a systematic addition, we recommend combining it with SONAX PROFILINE MultiClean Alkaline — together, both products form the complete cleaning system for all types of contamination encountered in professional vehicle detailing. Detailing shops that use the MultiClean duo as a fixed cleaning system benefit from a standardized procedure that can be adapted for all vehicle types and contamination profiles and delivers consistently good results.

Important for businesses that regularly use the concentrate: The product should be stored cool and dry; direct sunlight and frost should be avoided. Seal the container tightly after removal to prevent changes in concentration due to evaporation. In professional use, it is recommended to prepare daily quantities in separate containers — this ensures that freshly diluted cleaner is always used, maintaining consistent cleaning performance. With these simple handling rules, the 5-liter concentrate is a permanently economical and effective component of the professional cleaning portfolio.