RELEST Wind Gelcoat Transparent - I372-0002 In-mould Gelcoat is a polyurethane coating used as an intermediate coat. RELEST Wind Gelcoat transparent is designed as an intermediate coat, part of a wind turbine blade protection system. RELEST Wind Gelcoat transparent features especially good adhesion to epoxy laminating resin, good levelling and fast curing. RELEST® Wind transparent gelcoat is normally roller-applied, without thinning, evenly onto a cold or hot mould with release agent, known as in-mould gelcoat. Parameters on this page: dry film thickness 450 µm (18 mils); theoretical spreading rate 0.5 kg/m².
Source: AKZONOBEL original technical data sheet (TDS) 'RELEST Wind Gelcoat Transparent - I372-0002 In-mould Gelcoat'. Spreading rate and other values converted from the TDS; for 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 | 99% |
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| Dry Film Thickness | 450 µm (18 mils) |
| Theoretical Spreading Rate | 0.5 kg/m2 |
| VOC | 36 g/L calculated value. For more details, see the 'Product Characteristics' section. |
| Density / Specific Gravity | 1.11 kg/L (9.3 lb/gal) |
| Number of Components | — |
| Thinner | Do not thin |
| Mixing Ratio | Use Part B RELEST Curing Agent PUR 13 (I385-0013):10… |
| Colour / Appearance | Colourless, WIND GELCOAT |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Product Code: I372-0002. A solvent-free polyurethane coating with viscoplasticity and high tear propagation strength. Suitable for making a transparent, bubble-free, fast-drying intermediate coat.
RELEST Wind Gelcoat transparent can only temporarily protect the laminating resin from UV radiation. The protection time depends on the epoxy resin used and must be checked by the customer. This intermediate layer must be covered with at least one coloured, weathering-resistant topcoat.
RELEST Wind Gelcoat transparent features especially good adhesion to epoxy laminating resin, good levelling and fast curing. Because of its long pot life, the product can be easily applied to large surfaces.
RELEST Wind Gelcoat transparent is designed as an intermediate coat, part of a wind turbine blade protection system.
RELEST
| Colour | Colourless, WIND GELCOAT |
|---|---|
| Gloss | Glossy, TRANSPARENT |
| Volume Solids | 99% |
| Typical thickness | Dry film thickness 450 µm (18 mils) |
| Theoretical Spreading Rate | 0.5 kg/m² at 450 µm and the stated volume solids; approx. 2.0 m²/kg |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Roller; for drying time refer to the recommended topcoat recoat interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 20°C (68°F) | 60 min | 180 min | 60 min | 72 h |
| 23°C (73°F) | 25 min | 95 min | 60 min | 72 h |
| 30°C (86°F) | 20 min | 65 min | 60 min | 72 h |
| • Touch dry and hard dry correspond to TG1 and TG7 respectively, in accordance with | ISO 9117-5 |
• Drying times depend on the substrate temperature and ventilation.
• The above data are measured at
| 20 °C / 30% RH; 23 °C / 65% RH | Measured at 35 °C / 85% relative humidity. • Forced drying up to 50 °C. For more information, consult the local representative. |
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| Flash point (typical) | Component A 145 °C (293 °F); Component B >99 °C (210 °F) |
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| Product weight | 1.11 kg/L (9.3 lb/gal) |
| Volatile Organic Compounds | 36 g/L calculated value. For more details, see the 'Product Characteristics' section. |
The mould treated with a suitable release agent (preliminary test if necessary) must be clean, dry and free of dust and other contaminants.
Before applying RELEST Wind Gelcoat transparent, the mould temperature should be between 10 °C and 40 °C (50 °F – 104 °F).
| Mixing | Thoroughly mix parts A and B with a mechanical mixer, avoiding entraining too much air. |
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Because of the short pot life of this product, mix small quantities to ensure maximum production efficiency.
| Mixing ratio | Use part B RELEST hardener PUR 13 (I385-0013): 100 parts : 51 parts by volume; 100 parts : 53 parts by weight. Viscosity (base): 13600 mPa·s; rotational measurement |
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| Pot life | 20°C (68°F) | 23°C (73°F) | 35°C (95°F) |
| 20 min | 15 min | 8 min |
• The above data were measured at 20 °C / 30% RH, 23 °C / 65% RH, 35 °C / 85% RH. • Once the specified pot life is exceeded, the material must not be used, as this may cause performance degradation.
| Roller application | Recommended |
|---|---|
| Thinner | Do not thin |
| Cleaner | RELEST Thinner PUR 132 |
| Interruption of work | Clean all equipment thoroughly with RELEST Thinner PUR 132. Once mixed, a batch of paint shall not be re-sealed; if work is interrupted for too long, remix a fresh batch of paint. |
| Cleaning | Clean all equipment immediately after use with RELEST Thinner PUR 132. |
All surplus paint and empty containers must be disposed of in accordance with the relevant local laws/regulations.
For advice on release agents and infusion resin, contact the local representative.
Apply this product with a suitable roller (e.g. SUPERFLOC roller).
RELEST® Wind transparent gelcoat is normally roller-applied, without thinning, evenly onto a cold or hot mould with release agent, known as in-mould gelcoat.
Because of the limited pot life of the product, mix several small batches successively according to the mould size.
When using the mixed material, ensure as little air as possible is rolled into the coating.
When the specified working life is exceeded, the material must no longer be used, e.g. when the gelling process has begun. This may cause bubbles, structural differences and cracking.
Then apply the glass-fibre-reinforced liquid epoxy resin. An adhesion test beforehand is recommended.
The curing time of RELEST Wind Gelcoat transparent depends on the coating thickness.
At the recommended 450 µm dry film thickness, the glass fibre mat can be applied after 70 minutes at 20 °C or 60 minutes at 50 °C.
Cured RELEST Wind Gelcoat transparent can be sanded after demoulding.
The gelcoat surface must be sanded before rework, to reliably remove adhering release agent residues.
(*) Because of the heat released by the reaction (exothermicity), the pot life depends largely on the quantity of mixed/remaining material.
Mix only a small quantity each time, since the product's pot life is relatively short.
For ideal application and drying performance, the ambient and substrate temperatures should be above 10 °C (50 °F), with relative humidity below 80%. Maintain good ventilation to improve drying and recoating characteristics and for fast application. Temperatures below 10 °C (50 °F), or relative humidity above 80%, delay coating drying and extend recoat intervals.
The temperature of the surface to be coated must be at least 3 °C (5 °F) above the dew point.
This transparent coating must be covered with at least one coloured, weather-resistant topcoat.
| Shore A hardness (24 h at 50 °C) | 75. Note: the VOC value is a typical value for guidance only. It may vary with colour and normal production tolerance. |
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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, consult your local International Paint representative for further advice.
Warning: contains isocyanates. Wear an air-fed helmet when spraying.
| Packaging Specifications | Shipping weight |
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| Shelf life | At least 18 months in the original unopened containers at 25 °C (77 °F), after which inspection is required. Store in a dry, cool place away from heat sources and ignition sources. Opened containers shall be re-sealed and the material used promptly. |
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The information given in this product data sheet is not exhaustive. Anyone who uses, for any purpose, any product other than those specifically recommended in this data sheet without first obtaining our written confirmation does so at their own risk as regards the suitability of the product for the intended purpose. Although to the best of our knowledge all advice or statements given about the product (whether in this data sheet or otherwise) are correct, we cannot control the quality or condition of the substrate, nor the many factors affecting the use and application of the product. Accordingly, unless we specifically agree otherwise in writing, we accept no liability, to the maximum extent permitted by law, for any product performance problem arising, or for any loss or damage caused by use of the product. We hereby disclaim any warranty or representation, express or implied, arising by operation of law or otherwise, including but not limited to any implied warranty of merchantability or fitness for a particular purpose. All products supplied and all technical guidance provided are subject to our standard terms and conditions of sale. You should obtain a copy of this document and read it carefully. The information contained in this product data sheet may be amended at any time in the light of experience and of our product development policy. Before using the product, it is the customer's responsibility to check with the local representative that the data sheet in their possession is the latest version.
This product data sheet is available on www.international-marine.com or www.international-pc.com and should be identical to this copy. If the version on the website differs from this one, the version on the website shall prevail.
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Data is subject to the manufacturer's latest version; in all cases the manufacturer's latest TDS prevails.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
