600055 - SIKKENS Autosurfacer Optima Gray Primer - 3L KO DRAFT

• Type: 2K Primer – versions Sanding (with sanding) and Non Sanding (without sanding)
• Colors: White, Gray, Dark Gray (mixable in 5 shades of gray Quick-Mix)
• Hardeners: Autosurfacer Optima Hardener Sanding / Hardener Non Sanding
• Thinners (activators): Reducer Sanding Fast, Medium, Slow / Reducer Non Sanding Medium, Slow
• Drying at 20 °C (Sanding): sandable in ~30–60 min depending on thickness and thinner
• Forced drying: 60 °C ≈ 10 min (without prior evaporation) – IR ≈ 5 min (max 100 °C on the element)
• Without sanding: evaporation 15 min at 20 °C · recoatable up to 24 h at 20 °C
• Target thickness: Sanding ≈ 45–50 µm /coat (≈120–130 µm in complete cycle) · Non Sanding ≈ 25–30 µm (1 coat)
• Indicative pot-life: Sanding (Fast/Medium) ≈ 30 min at 20 °C · Sanding (Slow) ≈ 30 min at 30 °C · Non Sanding (Medium) ≈ 35–45 min at 20 °C · Non Sanding (Slow) ≈ 60 min at 30 °C
• Substrates: steel and aluminum (direct to metal), OEM e-coat (degreased/sanded), old paints, polyester fillers, plastics primed with suitable adhesion promoter
• Finish compatibility: Sikkens Autowave / Autowave 2.0 / Autobase Plus / Autocryl Plus / Autocryl Plus LV
• EU VOC: Cat. IIB.c – ready to use ≤ 540 g/L

Mixing Ratios

With sanding (Sanding)

• Volume ratio: 3 Autosurfacer Optima : 1 Hardener Sanding : 1 Reducer Sanding (Fast/Medium/Slow)
• Mixing order: add the hardener first and stir, then the thinner and stir again
• Shades of gray: White / Gray / Dark Gray mixable (Quick-Mix table)

Without sanding (Non Sanding)

• Volume ratio: 3 Autosurfacer Optima : 1 Hardener Non Sanding : 2 Reducer Non Sanding (Medium/Slow)
• Mixing order: same sequence as above

Application

Surface Preparation

• Degrease then final dry sanding: metal ≈ P320 · finish areas P500 (P600 recommended on dark shades)
• Avoid any contact of exposed primer with water (e.g., water-based degreaser)
• Plastics: pre-treat/sand/clean + suitable adhesion promoter

Spray Gun Settings (gravity)

• Sanding: nozzle 1.6–1.8 mm · 1.7–2.0 bar at the air cap · HVLP 8–10 psi at the nozzle
• Non Sanding: nozzle 1.2–1.4 mm · 1.7–2.0 bar at the air inlet · HVLP 0.6–0.7 bar (8–10 psi) at the nozzle

Application Process

• Sanding – touch-up/spot: 1 thin closed coat (wait until matte ~1–3 min) + 1–2 full coats without intermediate evaporation
• Sanding – full element: 1 thin closed coat (wait until matte ~1–3 min) + 2 full wet coats without evaporation
• Non Sanding: 1 full coat sprayed over the entire area

Scuffing & Sanding

• Sanding: by hand P400 (exception S8.06.02) · finish P500/P600
• Non Sanding: small defects: P800 dry or P1000 wet (if > 24 h, careful sanding is required)

Workshop Benefits

• Ultra-short cycles (air, 60 °C or IR) for maximum productivity
• Flexible application: sandable / non-sandable versions according to workflow
• Very good corrosion resistance (direct to metal application possible in Sanding/Non Sanding*)
• Smooth finish enhancing the appearance of basecoats and clears

*For highly exposed surfaces, prefer pre-treatment (Autoprep wipes or Washprimer 1K CF) before priming.

Safety & Storage

• Use appropriate PPE: gloves, goggles, and air-fed respirator
• Store closed at ~20 °C, away from extreme temperatures – Shelf life 12 months (all variants)
• Equipment cleaning: Sikkens solvents / Guncleaner cleaners

About

Designed for demanding body shops, Autosurfacer Optima reduces downtime and limits touch-ups thanks to fast sanding and stable application.

Its extensive compatibility (bare metal, e-coat, primed plastics) and Sanding / Non Sanding versions make it a reference 2K primer for IR and 60 °C baking processes.

Ideal in combination with Sikkens Autowave, Autobase Plus, and Autocryl finishing systems for reproducible and durable results.

Photo non contractuelle

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