599954 - Hardener SIKKENS Optima hardener sanding 1L

The hardener Autosurfacer Optima Hardener Sanding is specially designed for the sandable version of the primer Autosurfacer Optima. It allows for quick drying, easy sanding, and high productivity — ideal for modern repair cycles. :contentReference[oaicite:1]{index=1}

Technical Features

• Product Name: Autosurfacer Optima Hardener Sanding (Sikkens)
• Type: 2-K polyisocyanate hardener for “Sanding” version
• Compatibility: Exclusively with Autosurfacer Optima Sanding + “Reducer Sanding” (Fast/Medium/Slow) :contentReference[oaicite:2]{index=2}
• Mixing Ratio (vol.): 3 Optima : 1 Hardener Sanding : 1 Reducer Sanding (Fast/Medium/Slow) :contentReference[oaicite:3]{index=3}
• Pot-life: Approx. 30 min at 20°C (Fast/Medium) · up to 30 min at 30°C (Slow) :contentReference[oaicite:4]{index=4}
• Drying Time at 20°C: Sandable in ≈ 30–60 min depending on thickness/thinner :contentReference[oaicite:5]{index=5}
• Forced Drying: 60°C ≈10 min · IR ≈5 min (max element temp 100°C) :contentReference[oaicite:6]{index=6}
• Application: 1 thin closed coat + 1–2 full coats without intermediate evaporation :contentReference[oaicite:7]{index=7}
• Gun Settings (sandable version): nozzle 1.6‑1.8 mm · 1.7‑2.0 bar · HVLP 0.6‑0.7 bar (8‑10 psi) :contentReference[oaicite:8]{index=8}
• Storage: Approximately 12 months at ~20°C in closed packaging :contentReference[oaicite:9]{index=9}
• Compatible Finishes: Can be overcoated with all Sikkens clears/finishes (e.g., Autowave, Autocryl, etc.) :contentReference[oaicite:10]{index=10}

Product Benefits

• Quick Drying: significantly reduces downtime before sanding or finishing
• Flexible Application: choice of thinners (Fast, Medium, Slow) suited to temperature and size of the repaired element
• Surface Quality: ensures good adhesion and a homogeneous surface, ready for sanding before finishing
• Reliability: stable and reproducible process, compliant with manufacturer specifications and Sikkens system :contentReference[oaicite:11]{index=11}

Recommended Applications

• Preparation of body elements after sanding (spot repair, full panels)
• Substrates: bare steel, aluminum, OEM e-coat, polyester fillers, treated plastic parts :contentReference[oaicite:12]{index=12}
• Use in body shops seeking productivity, quality, and short cycle times

Usage & Preparation Tips

• Surface Preparation: Degrease, final sanding P320–P500 (P600 recommended for dark colors) :contentReference[oaicite:13]{index=13}
• Mixing: Follow the 3:1:1 ratio; add the hardener first, mix well, then incorporate the thinner. :contentReference[oaicite:14]{index=14}
• Application: Apply one thin closed coat then 1 to 2 full coats without intermediate flash-off. :contentReference[oaicite:15]{index=15}
• Sanding: Block sand P400 (exception) then machine P500–P600 depending on dark color or not. :contentReference[oaicite:16]{index=16}

Safety & Storage

• Required PPE: Protective gloves, goggles, and air-fed respirator strongly recommended — professional use only. :contentReference[oaicite:17]{index=17}
• Storage: Keep at ~20°C, closed packaging, avoid significant temperature fluctuations. :contentReference[oaicite:18]{index=18}

About

The Autosurfacer Optima Sanding hardener is a key component of the Sikkens system designed to meet the needs of modern workshops: combining speed, quality, and durability in repairs. It integrates perfectly into a “short cycle” process and allows for optimizing efficiency without compromising the finish. :contentReference[oaicite:19]{index=19}

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