Belzona 5711 paste fortifies and repairs wind turbine blades in-situ

In response to growing market demand, Belzona (Harrogate, U.K.), a company leading the design and manufacture of polymer repair composites and industrial protective coatings, now offers a complete leading-edge repair and protection solution. Optimized to be easy to apply, fast curing and hard-wearing, the combination of Belzona 5711 and Belzona 5721 is specially designed to fortify wind turbine blades in-situ across a broad application temperature range.

Belzona 5711, a solvent-free, two-part thixotropic repair paste with a three-year shelf life, was designed to be applied in conjunction with the Belzona 5721 protective coating (amongst other product options). According to Jason Horn, Belzona research and development manager, the paste has a good working life which enables it to be contoured/formed exactly to the leading edge of the blade and removes the need for sanding. Moreover, it cures quickly and can be directly overcoated with Belzona 5721 in as little as 30 minutes at 20°C/68°F, without the need for any additional preparation. At the same temperature, Belzona 5721 will be fully cured within five hours, allowing the turbine to be returned to service in the same day.

Additional key benefits cited include:

• Cartridge packaging ensures good mixing quality and ease of use.
• Product is suitable for all climates (5-40°C/41-104°F) with a maximum overcoat window of 24 hours.
• Reduced health and safety risks (labeled CMR-free in EU).
• Single component rather than two grades for all climates.
• Higher volume per cartridge ensures reduced packaging waste.
• Can be applied either at offshore or onshore wind farms.
• Can be used to repair manufacturing defects.
• Extends wind turbine blade lifespan, therefore supporting net zero goals.

In addition, Belzona 5711 is available worldwide through the network of Belzona international distributors.