Koch-Chemie Glass PrePolish Gpp — High-Purity Cerium Glass Polish, 250 ml

High-Purity Cerium Oxide Intensive Glass Deep-Cleaning Polish

Koch-Chemie Glass PrePolish (Gpp) is a specialized abrasive glass compound engineered to restore optical clarity and deep-clean automotive windscreens, side windows, and panoramic roofs. Powered by micro-fine high-purity cerium oxide, Gpp eliminates calcified mineral deposits, industrial fallout, silicone residues, wiper haze, and failing hydrophobic coatings.

Key Performance Advantages

• Chemical & Mechanical Cleansing: Cerium oxide particles chemically react with glass surface silica while polishing away stubborn mineral films.
• Mandatory Pre-Coating Base: Completely strips expired sealants and road grime to ensure maximum covalent bonding for Ceramic Glass CG0.01.
• Wiper Sweep Refinement: Removes microscopic glass surface roughness that causes wiper blade judder and chattering.
• Rotary & DA Polisher Safe: Formulated for effortless work with machine polishers or manual hand polishing pucks.

Recommended Application Protocol

• Pad Recommendation: Use with a medium or firm polishing foam pad or specialized glass polishing felt pad.
• Machine Settings: Rotary polisher: 800–1200 RPM; Dual-Action polisher: medium speed setting.
• Processing: Shake well. Apply 3–4 drops onto the pad. Work crosswise across a glass section with moderate downward pressure until the paste breaks into a milky residue.
• Wiping & Inspection: Wipe off residue using a damp microfiber towel. Inspect with water to verify a completely uniform wet sheeting response (zero beading confirms 100% clean glass).

Precautions & Pro Tips

• Windshield Rubber Trim: Mask surrounding rubber window moldings and plastic scuttles to prevent polishing dust residue.
• Storage: Store upright between +5 °C and +25 °C. Protect from freezing.

Technical Specifications