RELEST Wind WB Topcoat LI - I394-x8xx is a topcoat. Specially designed for wind-turbine blades made of glass-reinforced epoxy (GRE) composite. Product code: base (RLA31X, I394-x8xx)/curing agent (RLA626, I385-3894). RELEST Wind WB Topcoat LI is suitable for outdoor use, with excellent weatherability and levelling. This phenomenon can be eliminated by adding Relest Wind antifoam I109-0394 (0.5% addition) to the RELEST Wind WB Topcoat LI component A. Parameters on this page: theoretical spreading rate 13.14 m²/L.
Source: AkzoNobel original technical data sheet (TDS) "RELEST Wind WB Topcoat LI - I394-x8xx"; spreading rate and other values are converted from TDS parameters and are for selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 46% |
|---|---|
| Dry Film Thickness | — |
| Theoretical Spreading Rate | 13.14 m²/L |
| VOC | VOC (base) 28.6 g/kg, ISO 11890-1, 8.… |
| Density / Specific Gravity | 1.3 kg/L (10.8 lb/gal) |
| Number of Components | Two-component |
| Thinner | Clean water. If required, add to RELEST Wind WB Topc… before roller application |
| Mixing Ratio | Using component B Relest Curing Agent PUR 3894 (I385-3894):… |
| Colour / Appearance | Available in various colours, WIND WB TOPCOAT |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Product code: base (RLA31X, I394-x8xx)/curing agent (RLA626, I385-3894). RELEST Wind WB Topcoat LI is suitable for outdoor use, with excellent weatherability and levelling. The main advantages of this product are application reliability at high film thickness and reduced isocyanate content.
Specifically designed for wind turbine blades of glass-reinforced epoxy (GRE) composite. Suitable for new construction and maintenance in the wind power industry.
RELEST
| Colour | Available in various colours, WIND WB TOPCOAT |
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| Gloss | Matt LI |
| Volume Solids | 46% |
| Typical thickness | Two coats, each 30–40 µm (1.2–1.6 mil) dry film, equivalent to 65–87 µm (5–6.9 mil) wet film per coat. Normally applied in two coats by roller. |
| Theoretical Spreading Rate | At 35 µm dry film thickness and the stated volume solids, 13.14 m²/L. |
At 1.4 mil dry film thickness and the stated volume solids, 535.4 ft²/US gal, equivalent to about 10.11 m²/kg.
| Practical Spreading Rate | Allowing for a suitable loss factor |
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| Density | Mixture density approx. 1.3 g/cm³ (varies with colour) |
| Application Methods | Conventional spray, air-assisted airless spray, roller. Drying time: recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 18°C (64°F) | 1.5 h | 9 h | 1.5 h | 24 h |
| 23°C (73°F) | 1 h | 7 h | 1 h | 24 h |
| 35°C (95°F) | 1 h | 6 h | 1 h | 24 h |
| • Touch dry and hard dry correspond to TG1 and TG7 respectively, in accordance with | ISO 9117-5 |
• Drying time depends on substrate temperature, ventilation and humidity.
• Minimum recoat interval depends on substrate temperature, ventilation and humidity.
Recoat once the coating shows a matt appearance.
• The above data are tested under the following conditions:
| 18°C / 30% RH | 23°C / 65% RH 35°C / 85% RH |
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| Flash point (typical) | Component A 91 °C (196 °F); Component B 99 °C (210 °F) |
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| Product weight | 1.3 kg/L (10.8 lb/gal) |
| Volatile Organic Compounds | VOC (base) 28.6 g/kg, ISO 11890-1, 8.4 VOC content in g/L excluding water. |
VOC (curing agent) 199 g/kg, ISO 11890-1, 8.4 VOC content in g/L excluding water.
VOC (mixture) 48 g/kg, ISO 11890-1, 8.4 VOC content in g/L excluding water.
Coating hazards: GB 30981.2-W-Pb≤1000-NC. Complies with GB 30981.2-2025. For further details, see the "Product Characteristics" section.
Surface cleaning: all surfaces to be coated shall be clean, dry and free from contamination. Oil and dirt shall be removed before painting; use vacuum or clean, dry compressed air, and wipe with a clean, oil-free, dry cloth to remove all dust thoroughly.
| Abrading preparation: | Before sanding substrates, gelcoat and putty, clean the surface thoroughly; when sanding, work in a well-ventilated area with a continuous flow of fresh air. Insufficient sanding may result in poor adhesion of RELEST Wind WB Topcoat LI to the surface. However, over-sanding or using too-coarse sandpaper may expose surface pores or create sanding scratches too deep to be filled by RELEST Wind WB Topcoat LI. It is recommended to sand primer and filler surfaces with 120–180 grit sandpaper. Before using RELEST Wind WB Topcoat LI, remove any residual contaminants (such as dust or coating/filler particles) from the surface by a suitable method. |
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| Mixing | Once mixed, the product shall be used within the specified pot life. |
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(1) Stir the base (Component A) with a power stirrer;
(2) Stir the curing agent (Component B) with a power stirrer;
(3) Mix all of the curing agent (Component B) with the base (Component A) and mix thoroughly with a power stirrer.
Insufficient manual stirring may cause film defects. Ensure the equipment is clean during application and no air is entrapped during stirring. The mixture shall be transferred to another container before use. The ideal application viscosity depends on the local environment and shall be adjusted accordingly.
The mixing method may affect the final film gloss
| Mixing ratio | Using component B Relest Curing Agent PUR 3894 (I385-3894): 7 parts : 1 part by volume, 8 parts : 1 part by weight |
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| Pot life | 18°C (64°F) | 23°C (73°F) | 35°C (95°F) |
| 60 min | 45 min |
• The above data are tested under the following conditions: 18 °C / 30% RH, 23 °C / 65% RH, 35 °C / 85% RH
| Suitable for airless spray | Recommended: use suitable dedicated equipment. |
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Air-assisted airless spray: nozzle diameter 0.28–0.38 mm (11–15 mil); total paint pressure at the nozzle not less than 80 kg/cm² (1138 psi); atomisation 1–3 bar
| Air spray (conventional) | Recommended: nozzle 1.5–2 mm; atomisation 1–3 bar |
|---|---|
| Roller application | Recommended |
| Thinner | Clean water. If required, add 0–10% clean water (by weight) to RELEST Wind WB Topcoat LI before roller application |
| Cleaner | Relest Thinner W 900 or GTA220 can clean all components. |
International GTA220. Note: Relest Thinner W900 and GTA991 must not be used to clean equipment containing International GTA991 isocyanate.
| Interruption of work | Do not leave paint in hoses, spray guns or spray equipment. After |
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| Cleaning | Clean all equipment immediately after use with clean water. |
All surplus material and empty containers must be disposed of in accordance with the appropriate local laws/regulations.
Gloss and surface evenness depend on the application method. Avoid mixing different application methods as far as possible.
Application at relative humidity below 30% may cause blistering of the coating surface, most commonly with roller application. This can be eliminated by adding Relest Wind antifoam I109-0394 (0.5% addition) to the RELEST Wind WB Topcoat LI component A.
When applying RELEST Wind WB Topcoat LI in confined spaces, ensure adequate ventilation.
Condensation on the surface during or after application will cause loss of gloss and a poor-quality film.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
RELEST Wind WB Topcoat LI can be overcoated once the film shows a matt appearance.
RELEST Wind WB Topcoat LI can be spray-applied; for more information, consult the local representative.
Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.
For suitable primers/intermediate coats, consult the local International Paint representative.
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | In the following documents on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rate. These sections are also available as separate publications on request. |
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This product must be applied at the production site by professional applicators in accordance with the recommendations in this manual, the Material Safety Data Sheet and the instructions on the container label. Do not use this product without first reviewing the Material Safety Data Sheet (MSDS) that International Paint provides for its customers.
All work related to the application and use of this product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.
If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; use appropriate personal protective equipment and adequate local ventilation.
If in doubt about the suitability of this product for the intended use, consult AkzoNobel for further advice.
Warning: contains isocyanates. Wear an air-fed helmet when spraying.
| Binder | Curing agent |
|---|
| Weight | Volume | Packaging | Weight | Volume | Packaging |
| 10kg | 8.8L | 10L | 10kg | 8.8L | 12L |
| 20kg | 15.66L | 20L | 200kg | 175.9L | 203L |
| 200kg | 156.62L 210L |
| Binder | Curing agent |
|---|---|
| Gross weight | |
| 11.62kg | 11.41kg |
| 21.79kg | 221kg219kg |
| Shelf life | Minimum 18 months at 25 °C (77 °F). Thereafter, inspection is required. Store in a dry, cool environment away from heat and sources of ignition. |
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Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
