{"product_id":"koch-chemie-vorreiniger-b-vb-vorreiniger","title":"Pre-cleaner B \"Vb\" Pre-cleaner","description":"\u003ch2 id=\"speakable-headline\"\u003eThe alkaline pre-wash with Koch-Chemie Vorreiniger B\u003c\/h2\u003e\n\n\u003cblockquote id=\"speakable-summary\"\u003e\n  \u003cp\u003e\u003cem\u003eKoch-Chemie Vorreiniger B is a highly concentrated alkaline pre-cleaner with a pH of 13.1 for touchless vehicle pre-washing. Phosphate-free, VDA-compliant Class A and B, quick-separating according to ÖNORM 5106, and with corrosion inhibitors for anodized aluminum. Not a mild snow foam for active coatings — a workshop alkaline cleaner for real dirt.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\n\u003chr\u003e\n\n\u003cp id=\"speakable-definition\"\u003e\u003cstrong\u003eKoch Chemie Vorreiniger B\u003c\/strong\u003e is a highly alkaline pre-cleaner concentrate from Koch-Chemie in Unna, which chemically dissolves insects, bird droppings, environmental dirt, and rim contamination before the actual vehicle wash. With a pH of 13.1, the pre-cleaner operates in the workshop segment between medium-strength foam pre-cleaners and industrial alkaline cleaners. The combination of highly effective complexing agents and special surfactants simultaneously dissolves organic and inorganic deposits — typical for car washes and vehicle detailers with high throughput.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/d1_koch-chemie-vorreiniger-b-vb-vorreiniger_hero.jpg?v=1776198373\" alt=\"Koch-Chemie Vorreiniger B Vb im Detailing1 Warehouse\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:1.5em 0;\"\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003epH 13.1 dissolves insects and brake dust simultaneously.\u003c\/strong\u003e The combination of complexing agents and special surfactants works against organic deposits like insect residues and bird droppings, as well as against inorganic rim contamination. One product replaces two steps — saving time, water, and product.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVDA-compliant Class A and B.\u003c\/strong\u003e One of the few pre-cleaners with double VDA classification: 1:300 for up to 5 minutes exposure time (Class A) or 1:30 for a maximum of 1 minute (Class B). Car washes and hand washes are covered by one product.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion inhibitors for anodized aluminum.\u003c\/strong\u003e The inhibitors protect sensitive components despite pH 13.1 — relevant for vehicles with visible aluminum components, alkali-resistant painted aluminum rims, and chrome applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cblockquote class=\"praxistipp\"\u003e\n  \u003cp\u003e\u003cstrong\u003ePractical tip from Detailing1:\u003c\/strong\u003e Never apply Vorreiniger B to hot or sun-warmed surfaces. At paint temperatures above 30 degrees, the cleaner dries before the exposure time is reached — this leaves dull streaks that can only be removed with polish. Before application, place the vehicle in the shade or pre-wash with cold water. In direct summer sun, it's better to use the milder Pre-Foam efficient, which is significantly more tolerant with a maximum exposure time of 1 minute.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e1:30 for insects. 1:300 for high pressure.\u003c\/h3\u003e\n\u003cp\u003eThe dosage depends on the degree of contamination and the type of application. 1:30 to 1:50 for pre-wash, 1:3 to 1:10 for heavily soiled rims, 1:300 for self-service high-pressure systems.\u003c\/p\u003e\n\u003cp\u003eFor touchless pre-washing with a foam lance, you work with 1:30 to 1:50. One liter of concentrate at 1:50 yields 51 liters of ready-to-use solution — enough for about 20 to 25 passenger cars in normal exterior care.\u003c\/p\u003e\n\u003cp\u003eThe foam lance should operate with a flow rate of 0.8 to 1.2 liters per minute so that the foam consistency is correct and the cleaner adheres to vertical surfaces long enough to work. The pre-cleaner is applied from bottom to top to the cold, moistened vehicle — this prevents run marks on unevenly dried surfaces. After a maximum of 5 minutes exposure time (VDA Class A), rinse thoroughly with a high-pressure cleaner.\u003c\/p\u003e\n\u003cp\u003eIn self-service car washes, 1:300 is sufficient — this is the large-volume consumer dosage and significantly reduces product consumption over the year. For rim cleaning, you work with 1:3 to 1:10, sprayed directly onto the cold, dry rim, allowed to act for a maximum of 1 minute, then rinsed. Important: do not use on hot brake discs or warm rims. Heat accelerates the reaction uncontrollably and increases the risk of matting on painted aluminum rims.\u003c\/p\u003e\n\u003cp\u003eFor car washes with tunnel systems, you typically work at 1:100 to 1:200. The exposure time in the tunnel is usually 30 to 60 seconds, which safely adheres to the VDA-B limit of 1 minute. The higher dilution reduces foam volume at the spray arch but maintains sufficient cleaning power due to the high active ingredient concentration. For high vehicle throughput, switching to the 225 kg container is worthwhile — a price advantage per liter of concentrate.\u003c\/p\u003e\n\u003cp\u003eFor copolymer dewaxing — i.e., removing old preservatives before a new sealant — 1:5 to 1:10 is the correct dilution. Koch Chemie Vorreiniger B reliably dissolves polymerized wax layers. This is a step that many other alkaline \u003ca href=\"\/en\/collections\/vorreiniger\"\u003epre-cleaners\u003c\/a\u003e do not cover. The paint can then be treated directly with a new \u003ca href=\"\/en\/collections\/versiegelungen\"\u003esealant\u003c\/a\u003e — saving a separate dewaxing step with IPA or silicone remover.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/d1_koch-chemie-vorreiniger-b-vb-vorreiniger_anwendung.jpg?v=1776198374\" alt=\"Koch-Chemie Vorreiniger B Anwendung mit Schaumlanze im Warehouse\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:1.5em 0;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003eLimits of the workshop alkaline cleaner. No snow foam replacement.\u003c\/h3\u003e\n\u003cp\u003eKoch Chemie Vorreiniger B is not a mild foam pre-cleaner for coating-protected vehicles. pH 13.1 is workshop level — strong, uncompromising, but sensitive in application.\u003c\/p\u003e\n\u003cp\u003eIts strength lies in heavily soiled vehicles with insect, bird dropping, and environmental residues after a long highway drive or after winter. It also works reliably on stubborn brake dust on steel rims and alkali-resistant painted aluminum rims. The foaming is functional — not an optical show foam like with classic snow foam products, but a working foam that adheres to vertical surfaces.\u003c\/p\u003e\n\u003cp\u003eAn honest assessment of its limitations. First, Vorreiniger B is not friendly to active ceramic coatings. With regular use on coating-protected vehicles, it degrades the coating faster than a pH-neutral pre-wash foam. For vehicles with an active sealant, the milder Pre-Foam efficient is the better choice. Second, do not use it on polished aluminum or chrome surfaces — despite corrosion inhibitors, pH 13.1 can dull untreated light metals. The inhibitors protect anodized aluminum, not open aluminum.\u003c\/p\u003e\n\u003cp\u003eThird: It is not paint-surface friendly in the sense of hand wash chemicals. If you maintain your new car with the two-bucket method and mild car shampoo, you don't need Vorreiniger B in the garage. Its area of application begins where hand washing is no longer sufficient — with heavily soiled vehicles, commercial fleets, utility vehicles, and construction machinery.\u003c\/p\u003e\n\u003cp\u003eProtective equipment is mandatory, not optional. Nitrile gloves and safety glasses when preparing and applying. In case of skin contact, rinse immediately with plenty of water and remove residues with mild soap. Never leave the concentrate bottle open — the vapors of the alkaline cleaner irritate respiratory tracts and mucous membranes with prolonged exposure. Close tightly after use, store frost-free and dark.\u003c\/p\u003e\n\u003cp\u003eThe material compatibility of Vorreiniger B has clear limits. Steel, anodized aluminum, alkali-resistant painted surfaces, glass, and standard vehicle plastics are permitted. Polished light metals, open chrome surfaces, colored anodized layers (risk of discoloration), and matte painted surfaces without a protective film are not permitted. If in doubt, test on an inconspicuous area before the first application and observe for 3 minutes — this costs little time and prevents expensive damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/d1_koch-chemie-vorreiniger-b-vb-vorreiniger_ergebnis.jpg?v=1776199899\" alt=\"Koch-Chemie Vorreiniger B Werkstatt-Alkaliner pH 13,1\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:1.5em 0;\"\u003e\u003c\/p\u003e\n\n\u003ch3\u003eTarget group Vorreiniger B from professionals to private garages\u003c\/h3\u003e\n\u003cp\u003eKoch Chemie Vorreiniger B is designed for professionals and experienced private users with know-how in alkaline chemistry. It is not the right choice for beginners without protective equipment and experience.\u003c\/p\u003e\n\u003cp\u003eFor car washes, detailers, workshops, and self-service operators, it is a standard tool. The container sizes 22 kg and 225 kg cover commercial needs. The variants 5 kg, 11 kg, and 1 liter are aimed at individual users, smaller workshops, and experienced private customers with their own high-pressure equipment.\u003c\/p\u003e\n\u003cp\u003eThe 1-liter container is the appropriate entry point to test the product and dosage on one's own vehicle before upgrading to larger quantities. When preparing the dosage for the first time, work with a calibrated measuring cup — with the eyeball method, most beginners end up with a much too concentrated solution, which unnecessarily increases material stress and promotes streaking.\u003c\/p\u003e\n\u003cp\u003eIf you are looking for a mild, coating-compatible pre-wash foam, Pre-Foam efficient is a better choice. If you supply express car washes with extremely short exposure times, use Pre-Wash B. If you need the strongest cleaner for burnt-in oil and grease residues on engines and chassis, use Copo Star BMP-T. Vorreiniger B is the universal middle ground in the \u003ca href=\"\/en\/collections\/koch-chemie\"\u003eKoch-Chemie range\u003c\/a\u003e — phosphate-free, double VDA-compliant, quick-separating according to ÖNORM 5106, and therefore also approved for biological wastewater treatment plants.\u003c\/p\u003e\n\u003cp\u003ePrecisely this last point is the actual Detailing1 insight. Workshops with oil separators have a chronic problem with alkaline pre-cleaners. Many products form stable emulsions that overload the separator or exceed wastewater limits.\u003c\/p\u003e\n\u003cp\u003eVorreiniger B is tested for quick separation according to ÖNORM 5106. The emulsion separates again in the separator under standard conditions, and oil and water separate cleanly. Those who work in a commercial environment and have to consider their wastewater regulations will find that Koch Chemie Vorreiniger B provides an alkaline chemical that does not become a problem for the system — a detail that neither the product page nor competitor texts mention.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/d1_koch-chemie-vorreiniger-b-vb-vorreiniger_lineup.jpg?v=1776198373\" alt=\"Koch-Chemie Vorreiniger B Vb alle Gebinde 1 Liter bis 225 kg\" loading=\"lazy\" style=\"width:100%;height:auto;display:block;margin:1.5em 0;\"\u003e\u003c\/p\u003e","brand":"Koch-Chemie","offers":[{"title":"1000ml","offer_id":49515037360463,"sku":"D1-KCX-283001","price":25.69,"currency_code":"PLN","in_stock":true},{"title":"2x 1000 mL","offer_id":49725492592975,"sku":"D1-KCX-283001_2","price":50.38,"currency_code":"PLN","in_stock":true},{"title":"3x 1000 mL","offer_id":49725492625743,"sku":"D1-KCX-283001_3","price":74.77,"currency_code":"PLN","in_stock":true},{"title":"5kg","offer_id":48762940162383,"sku":"D1-KCX-283005","price":90.03,"currency_code":"PLN","in_stock":true},{"title":"11kg","offer_id":48762938851663,"sku":"D1-KCX-283011","price":205.88,"currency_code":"PLN","in_stock":true},{"title":"22kg","offer_id":49603231646031,"sku":"D1-KCX-283022","price":386.16,"currency_code":"PLN","in_stock":true},{"title":"225kg","offer_id":49603231678799,"sku":"D1-KCX-283225","price":3964.65,"currency_code":"PLN","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/koch-chemie-vorreiniger-b-vb-vorreiniger.png?v=1727529718","url":"https:\/\/detailing1.pl\/en\/products\/koch-chemie-vorreiniger-b-vb-vorreiniger","provider":"Detailing1","version":"1.0","type":"link"}