Jotatop LEP Pro Reinforced Leading-edge Protection Coating is a topcoat. Specially designed as protection for the leading edge of rotating wind turbine blades. Developed for glass-fibre-reinforced epoxy and/or polyester substrates, and other wind turbine blade coatings such as Jotatop BC100 and Jotatop BC300 WF. Parameters on this page: volume solids 81 ± 2%, dry film thickness 80–200 µm, theoretical spreading rate 10–4 m²/L. Comparable products of the same brand: Hardtop Optima Alu High-build Polysiloxane Aluminium Topcoat, Hardtop Optima High-build Polysiloxane Topcoat, Hardtop Smart Pack 1+1 Topcoat.
Data source: JOTUN original Technical Data Sheet (TDS), "Jotatop LEP Pro Reinforced Leading-edge Protection Coating"; spreading rate and other values are converted from the TDS parameters, 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 | 81 ± 2% |
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| Dry Film Thickness | 80–200 µm |
| Theoretical Spreading Rate | 10–4 m²/L |
| VOC | 157 g/L (China) |
| Density / Specific Gravity | 1.2 kg/L |
| Number of Components | Two-component |
| Flash Point | 65 °C |
| Thinner | Jotun Thinner No. 10 / Jotun Thinner No. 26 |
| Mixing Ratio | 1 part : 2 parts (by weight) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Jotatop LEP Pro
This is a two-component chemically cured aliphatic polyurea coating. It is a high-solids product. Has excellent rain erosion resistance, weather resistance and elasticity. Suitable as a leading-edge protection topcoat for wind turbine blades. Developed for glass-fibre-reinforced epoxy and/or polyester substrates, and other wind turbine blade coatings such as Jotatop BC100 and Jotatop BC300 WF. Used only as a tie coat in combination with Jotatop LEP Pro. Jotatop LEP Tiecoat must be applied to the leading-edge protection area before Jotatop LEP Pro.
Specially designed as protection for the leading edge of rotating wind turbine blades.
Others
Rain erosion testing carried out based on ASTM G73-10 "Standard Test Method for Liquid Impingement Erosion Using Rotating Apparatus" or DNV-RP-0171 "Testing of wind turbine blade erosion protection systems". Other certificates and certifications available on request.
RAL 7035
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 81± 2 % |
| Weight solids | Theoretical Value | 86 ± 2 % |
| Gloss (GU 60°) | ISO 2813 | Gloss (70–90) |
| Flash Point | ISO 3679 Method 1 | 65 °C |
| Density | Theoretical Value | 1.2 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| US | CARB(SCM)2020 / SCAQMD rule 1113 | Calculation | 168 g/L |
| Hong Kong | Air Pollution Control (VOC) Regulation | Calculation | 168 g/L |
| EU | European Paint Directive 2004/42/CE | Calculation | 168 g/L |
| China | Mandatory national standard of China | GB 30981.2-2025 | 157 g/L |
| Coating hazards GB | 30981.2-S-Pb≤1000-NC |
The data listed are based on factory batch production and may vary slightly with colour.
| Gloss description | According to JOTUN's definition of functional coatings |
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Typical recommended specification range
| Dry Film Thickness | 80–200 µm |
| Wet Film Thickness | 100–250 µm |
| Theoretical Spreading Rate | 10–4 m²/L |
| Note | These figures refer to the unthinned coating. |
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To achieve ideal leading-edge protection performance, a multi-coat application process is required. The wet film thickness (WFT) shall be measured during the application of each coat.
| Recommended total dry film thickness (DFT) | 300-500 µm |
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| Recommended total wet film thickness (WFT) | 375-625 µm |
Surface Preparation
| Substrate | Minimum | Recommended |
| Coated surface | Clean, dry and intact compatible primer. The surface should be mechanically abraded with P80–P240 grit sandpaper to form a uniform scratch texture. Jotatop LEP Tiecoat must be applied to the substrate surface beforehand and cured according to the curing conditions and time recommended in its application guide (AG) to ensure adhesion meets requirements. | |
| Composite | Surface treatment should start only after the composite is fully cured. Use non-metallic abrasive or fibre-bonded abrasive tools, or medium-fine sandpaper of P80–P240 grit, to form a uniform scratch texture on the surface by hand or mechanical abrading. | |
This product may be applied by the following methods
| Brush: | Recommended. For better levelling and surface appearance, the coating can be thinned with Jotun Thinner No. 10 up to 30% of the total mass of Components A and B. Maximum wet film thickness requirement: five wet coats, each 150 µm, with a curing interval of 0.5–2 hours between coats. Minimum wet film thickness requirement: three wet coats, each 150 µm. |
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Roller:
Recommended. Use a short-nap or flocked foam roller to achieve good levelling and reduce surface orange peel. The coating can be thinned with Jotun Thinner No. 10 up to 30% of the total mass of Components A and B. Maximum wet film thickness requirement: five wet coats, each 150 µm, with a curing interval of 0.5–2 hours between coats. Minimum wet film thickness requirement: three wet coats, each 150 µm.
| Trowel: | Recommended. Refer to the application manual. |
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| Jotatop LEP Pro Comp A — Reinforced Leading-Edge Protection Coating Pro, Component A | 1 part |
| Jotatop LEP Pro Comp B — Reinforced Leading-Edge Protection Coating Pro, Component B | 2 parts |
| Thinner | Jotun Thinner No. 10 / Jotun Thinner No. 26 |
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| Substrate Temperature | 10 °C | 23 °C | 40 °C |
| Touch Dry | 60 min. 40 min. | 30 min | |
| Handle dry | 10 h | 6 h | 4 h |
| Minimum recoat interval | 60 min | 40 min | 30 min |
| Dry/cured to service | 14 days | 7 days | 5 days |
For the maximum recoat interval, refer to the Application Guide (AG) for this product.
Drying and curing times are determined based on temperature and relative humidity below 80%, with dry film thickness within the average range.
| Note | If the overcoating interval exceeds 24 hours, sanding (grit P120–240) is required before overcoating. After sanding, remove dust with a microfibre cloth and overcoat within 1 hour. |
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| Touch Dry | The state at which light finger pressure leaves no mark or stickiness. |
| Handle dry | The minimum time after application before handling will not damage the film. |
Minimum recoat interval after drying: the recommended minimum interval before applying the next coat.
Dry/cured to service: the minimum time before the coating can be permanently exposed to a specific environment/medium.
| Paint temperature | 23 °C |
| Pot Life | 20 min |
The pot life of unthinned Jotatop LEP Pro is 20 minutes; if the A+B components are thinned with Jotun Thinner No. 10 at 20% by weight, the pot life can be extended to 30 minutes.
Temperature
| Continuous | Peak | |
| Drying, atmospheric | 120°C | 140 °C |
Withstands peak temperatures for a maximum of one hour.
At the above temperatures, protective performance is unaffected, but appearance may be affected.
Depending on the actual exposure conditions in service, this product may be used with various primers and topcoats. Some reference systems are listed below. For specific systems, contact JOTUN.
| Previous Coat | Polyaspartic |
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| Jotatop LEP Pro Comp A — Reinforced Leading-Edge Protection Coating Pro, Component A | Weight 1 kg | Container size (L) 1 |
| Jotatop LEP Pro Comp B — Reinforced Leading-Edge Protection Coating Pro, Component B | 2 kg | 5 |
The packaging sizes above are typical reference sizes for factory batch production. Due to regional regulatory differences, packaging sizes and capacities may vary by region.
Store in accordance with national regulations. Keep containers in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.
| Jotatop LEP Pro Comp A — Reinforced Leading-Edge Protection Coating Pro, Component A | 12 months |
| Jotatop LEP Pro Comp B — Reinforced Leading-Edge Protection Coating Pro, Component B | 12 months |
In some markets, the stated shelf life may be shortened to comply with local legal requirements. The above is the minimum shelf life; thereafter, testing is required to confirm quality remains acceptable.
For professional use only. Applicators and workers must be trained, experienced, capable and equipped to mix, stir and apply the coating correctly in accordance with JOTUN's technical documents. Applicators and workers must wear appropriate personal protective equipment when using this product. This guidance is provided based on current product knowledge. Any proposed modification to suit site conditions must be approved by the responsible JOTUN representative before use.
Read the safety warnings on the container packaging. Use in well-ventilated conditions. Avoid inhaling spray mist and avoid skin contact. In case of accidental splashes on skin, wash immediately with a suitable cleaner, soap and water. In case of eye contact, rinse thoroughly with water and seek medical attention immediately.
When used primarily as a primer or antifouling coating, products may show slight colour variation from batch to batch. Such products, and epoxy products used as topcoats, may chalk when exposed to sunlight.
Gloss and colour retention of topcoats depend on the colour type, the surrounding environment such as temperature and UV intensity, application quality and product type. Contact your local JOTUN office for further information.
The information in this datasheet is based entirely on knowledge gained in our laboratory and in practice. JOTUN products are regarded as semi-finished products, and their use is generally beyond our control. JOTUN therefore guarantees only the quality of the product itself. To comply with local regulations, the product may be adjusted, and we reserve the right to modify the datasheet without further notice.
Users should consult JOTUN for specific guidance on the suitability of the product for their requirements and applications.
In case of any discrepancy between language versions, the English (UK) version shall prevail.
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.
