Koch Chemie Clay Bar Heavy is a more aggressive option for deep surface cleaning. Built for heavily contaminated paintwork that’s due for polishing.
The Heavy Clay Bar from Koch Chemie is a high-strength car clay bar designed for tough jobs. It’s made to tackle deeply embedded contaminants like overspray, road tar, brake dust, industrial fallout, tree sap and rust bloom, particularly on neglected, weathered or older finishes. It’s intended for vehicles that are going to be polished afterward, where the priority is maximum cleaning power rather than paint safety alone.
Its abrasive formulation means it’s not suited to new paintwork or surfaces where correction is not planned. But when used correctly, especially with a proper clay bar lubricant like Koch Chemie Clay Spray, it makes short work of contamination and preps the surface for serious correction or coating work.
Use it on paint, glass, or even wheels where bonded grime has built up. You’ll feel the difference straight away. It has real bite, but stays consistent and predictable during use. For detailers working on daily drivers, commercial vehicles or paint that’s been neglected, this bar saves time and gets results fast.
If you’re after something gentler for soft clear coats or coated cars, the Koch Chemie Clay Bar Mild is a better fit. But when aggressive decontamination is needed before polishing, the Heavy Clay gets it done.
Features
- High-strength decontamination: Abrasive grade removes stubborn, bonded contaminants
- For paint, glass and wheels: Works across multiple surfaces on older or unprotected vehicles
- Designed for polish prep: Best used before correction or coating work
- Pairs with Koch Chemie Clay Spray: Essential for lubrication and smooth operation
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Not for new or sensitive paint: Requires polishing after use
Directions
- Wash the vehicle thoroughly before claying
- Shape the clay into a flat, palm-sized disc
- Lubricate the surface with Koch Chemie Clay Spray
- Glide the clay over the area using no pressure
- Fold the clay to a clean section as it picks up contaminants
- Lightly mist the clay after use and store it in its case to prevent drying