Glasurit 923-666 HS Clear VOC The Ultimate 2K Polyurethane Clearcoat For Premium Automotive Refinishing

Glasurit 923-666 HS Clear VOC is a premium, high-solids (HS) two-component (2K) polyurethane clearcoat engineered by BASF. Designed specifically for professional automotive refinishing, it delivers an exceptionally tough, scratch-resistant, and chemically stable protective film.

This VOC-compliant clearcoat is the industry standard for full-car resprays, large-area repairs, and applications demanding extreme weatherability and physical durability. When paired with the Glasurit 929-666 Hardener VOC, it establishes a flawless, high-build finish that meets the rigorous standards of global luxury automotive OEMs.

To ensure precise workshop integration, the chemical and physical properties of the Glasurit 923-666 system are detailed below:

1. Advanced Reflow Technology (Self-Healing Properties)

Glasurit 923-666 features a highly elastic polymer network. When exposed to minor surface friction—such as automatic car washes or micro-abrasions—the paint film utilizes "Reflow" technology to gradually close micro-scratches under ambient heat, maintaining a swirl-free finish.

2. Superior Film Build & High Solids Formulation

With a solid content exceeding 50% in its ready-for-use state, this clearcoat requires only 1.5 to 2 coats to achieve a robust 50-60 μm dry film thickness. This reduces material consumption while providing a deep, mirror-like "wet look."

3. Strict VOC Environmental Compliance

Formulated to meet global environmental mandates, its VOC emission level is strictly controlled below 419 g/L. It allows high-end bodyshops to operate seamlessly within environmentally restricted metropolitan areas without sacrificing performance.

4. Exceptional Chemical & UV Resistance

The 2K polyurethane crosslinked structure provides an impenetrable barrier against acid rain, bird droppings, tree sap, gasoline, and harsh industrial detergents. Integrated UV stabilizers prevent yellowing, chalking, and gloss loss over years of outdoor exposure.

For optimum performance and a defect-free finish, technicians must adhere to the following application sequence:

• Ensure the basecoat (e.g., Glasurit 90 Line waterborne system) is completely dry and has flashed off to a uniform matte finish.
• Use a high-quality tack rag to wipe the surface in a single direction to remove all micro-dust and overspray.

• Ratio: Combine 2 parts Glasurit 923-666 Clearcoat with 1 part Glasurit 929-666 Hardener by volume.
• Thinner: No thinner is required under standard conditions. For high-temperature environments, up to 10% of BASF original reducer may be added.
• Stir thoroughly and verify the viscosity is 18-21 seconds (DIN 4 cup at 20°C).

• Gun Type: Gravity-fed HVLP or RP premium refinish gun (e.g., SATA or Iwata).
• Nozzle Size: 1.3 mm to 1.4 mm.
• Inlet Pressure:
  • HVLP: 2.0 bar (0.7 bar at the air cap).
  • RP (Reduced Pressure): 1.8 - 2.2 bar.

• Apply 2 full wet coats to achieve a dry film thickness of 50-60 μm.
• First Coat: Apply evenly. Allow 3 to 5 minutes flash-off at 20°C before the next coat. The paint should be slightly tacky but not transfer to a gloved finger.
• Second Coat: Apply a full wet coat. Allow 5 to 10 minutes ambient flash-off before bake curing.
• Curing Schedule:
  • Force Drying (60°C): Bake for 30 minutes (metal temperature).
  • Air Dry (20°C): Dust-free in 30-45 minutes; fully cured in 10 hours (overnight).
  • Infrared (IR): Short-wave IR for 8 minutes or medium-wave IR for 10-15 minutes.

Glasurit 923-666 is engineered for high-exposure environments where standard clearcoats fail:

• OEM-Level Luxury Collision Repair: Approved by top-tier manufacturers (Porsche, Mercedes-Benz, BMW) for restoring factory-spec depth and hardness.
• Carbon Fiber Composite Protection: Provides an optically clear, non-yellowing protective layer for exposed carbon fiber components on supercars and aerospace parts.
• Marine Interior & Yacht Refinishing: Offers high salt-spray resistance and UV protection for premium wooden and composite yacht fittings.

We provide robust, export-standard packaging to ensure chemical stability during international transit:

• Glasurit 923-666 Clearcoat: 1 Liter per can | 6 cans per carton | Carton Dimensions: 32.5 × 22 × 17.2 cm
• Glasurit 929-666 Hardener: 0.5 Liter per can | 6 cans per carton | Carton Dimensions: 32 × 22 × 12.3 cm
• Palletization: Standard export pallets with moisture-barrier shrink wrapping and corner protectors.
• Shipping Documentation: Complete MSDS, ISO 9001 Certification, Technical Data Sheets (TDS), and Certified Marine Transport Appraisal for hazardous chemical shipping.

For international trade, customs clearance, and tax calculation, use the following Harmonized System (HS) classifications:

• Glasurit 923-666 HS Clearcoat:
  • HS Code: 3208.20.90 (Paints and varnishes based on acrylic or vinyl polymers, dispersed or dissolved in a non-aqueous medium)
• Glasurit 929-666 Polyisocyanate Hardener:
  • HS Code: 3824.99.92 (Chemical preparations/catalysts not elsewhere specified) or 3911.90.00 (Unused polyurethanes/isocyanates reactants)

As a leading B2B supplier of premium automotive refinishing materials, we support global distributors, importers, and high-volume bodyshops with:

• Tiered Wholesale Pricing: Competitive pricing structures based on container-load (FCL) or less-than-container-load (LCL) volumes.
• Supply Chain Security: Direct sourcing channels ensuring 100% genuine BASF Glasurit products with traceable batch codes.
• Global Logistics: Reliable shipping to Europe, North America, Asia-Pacific, and the Middle East, with full customs clearance support.

To achieve a flawless, warranted finish, we recommend using the complete Glasurit system:

1. Glasurit 90 Line Waterborne Basecoat: The perfect color-matching system designed to be topcoated with 923-666.
2. Glasurit 285-Series Primers/Fillers: High-build undercoats providing excellent adhesion and corrosion protection.
3. Glasurit 55 Line Solventborne Basecoat: For markets where solvent-based basecoats are utilized.

A: We strongly advise against this. Glasurit 923-666 is chemically calibrated to crosslink with Glasurit 929-666 Hardener. Using third-party hardeners can cause incomplete curing, loss of gloss, solvent popping, or premature paint film delamination.

A: If force-dried at 60°C for 30 minutes, the clearcoat can be polished 1 to 2 hours after the panel has cooled to room temperature. If air-dried at 20°C, wait 10 hours (overnight) before polishing to ensure the film has reached sufficient hardness.

A: Polyurethane hardeners contain isocyanates, which react aggressively with moisture in the air. Always seal the 929-666 can immediately after pouring. If storing a partially used can, purge the headspace with dry nitrogen or use it within 2 weeks. Do not use if the hardener appears cloudy or contains crystals.

A: Polyurethane reactions are highly sensitive to moisture. If the relative humidity exceeds 75%, free isocyanate groups in the 929-666 hardener can react with atmospheric moisture rather than the acrylic resin. This side reaction produces carbon dioxide gas, which can lead to micro-gassing (solvent popping), loss of gloss, or reduced chemical resistance. For environments with RH above 70%, we recommend using force-drying ovens or dehumidifying the spray booth to guarantee proper chemical crosslinking.

A: Glasurit 923-666 is globally approved by leading automotive manufacturers, including Mercedes-Benz, BMW, Porsche, and the Volkswagen Group, for warranty repairs. It has successfully passed stringent accelerated weathering tests, including the CAM180 (Continuous Advanced Moisture/UV exposure) and Florida outdoor exposure testing (24 months), showing zero chalking, cracking, or significant color shift, making it suitable for fleet and luxury vehicle refinishing worldwide.

A: Yes, but adjustments to the paint's electrical resistivity are required. Standard formulation resistivity is optimized for conventional gravity-fed or HVLP pneumatic spray guns. For electrostatic disc or bell sprayers, technicians must use specific polar solvents or additives to bring the paint resistivity into the optimal range (typically 50 to 150 kΩ). Please contact our technical department for custom resistivity adjustments for your specific line setup.

A: At a standard dry film thickness (DFT) of 50 μm, the dry paint film weight of Glasurit 923-666 is approximately 52–55 grams per square meter. Given its High Solids (HS) formulation with a low ready-for-use VOC level of ≤419 g/L, it releases up to 30% fewer volatile organic compounds per square meter compared to traditional Medium Solids (MS) clearcoats, helping high-volume industrial plants meet strict annual environmental VOC caps.

A: Glasurit 923-666 has been tested under international automotive laboratory standards, including:

• Acid Resistance (pH 2.0 sulfuric acid drop test): No etching or swelling after 24 hours at 50°C (DIN EN ISO 2812-1).
• Fuel Resistance (Premium gasoline immersion): No softening or loss of adhesion after 5 minutes of direct immersion (ISO 2812-3).
• Industrial Detergent Resistance: Withstands up to 500 wash cycles in heavy-alkali automatic washing simulations without scratching or clouding.

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