When you're dealing with wax-heavy finishes or silicone-loaded polishes, a basic wipe-down isn't going to cut it. Koch Chemie SIL strips those stubborn residues fast and clean.
Koch Chemie (SIL) Silicon & Wachsentferner is a professional-grade prep spray formulated to handle the tougher side of car paint prep. Whether you’re working on panels that have seen heavy wax application, silicone-based products, or polishing compounds packed with fillers, this alcohol-based solution breaks it all down efficiently.
Designed specifically for solvent-resistant surfaces, SIL by Koch Chemie is ideal for use prior to any sealing, waxing or coating step where you need the surface to be bare and residue-free. It removes both organic and synthetic contaminants without relying on halogenated hydrocarbons, which are often found in harsher industrial solvents.
For detailers who work with durable OEM or refinished paint systems, this car surface prep spray offers peace of mind through predictable, consistent performance. It gives you a properly degreased finish that ensures maximum bonding for ceramic coatings, synthetic sealants or any high-performance protection.
While strong, the formula can also be diluted (up to 1:4) for use on more sensitive paint types like single-stage or older finishes. That flexibility makes it a versatile, large-volume solution for workshop use, especially when working across multiple vehicle types or surface conditions.
Features:
- Alcohol-based degreaser: Effectively removes silicone oils, waxes and polishing residues
- Preps solvent-resistant paint: Ideal before applying coatings or sealants
- Non-halogenated formula: Free from harsh solvents and safer to use
- Dilutable for sensitive surfaces: Adjust strength based on surface type
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Large 5L volume: Suitable for workshop and high-throughput environments
Directions & Dilutions:
- Shake well before use
- For general use, apply undiluted to the surface
- For sensitive finishes (e.g. single-stage paint), dilute 1:4 with water
- Apply to the panel and allow a short dwell time
- Wipe off with a clean, dry microfiber towel
- Always check colour fastness and surface compatibility before full application