Belzona 5711
Wind Turbine Leading Edge Repair Cartridge
High Performance, Fast Curing System for Leading Edge Repairs
A high-performance, fast-curing 2-component cartridge system specially designed for repairing erosion and impact damage on the leading edges of wind turbine blades.
- SeriesBelzona 5000 Series
- Documents3
Overview of Belzona 5711
Belzona 5711 is a high-performance, easy-to-apply system specially designed for the repair of erosion and impact damage on the leading edges of wind turbine blades.
Supplied in a cartridge format, Belzona 5711 is well suited for in-situ repair, including by applicators using rope access. Its working life allows the product to be perfectly contoured to the leading edge, removing the need for sanding and eliminating a step in the repair process.
Belzona 5711 cures rapidly and can be directly overcoated with Belzona 5721 in just 45 minutes at 20°C / 68°F, with no additional surface preparation. Together, Belzona 5711 and Belzona 5721 provide a long-lasting repair and protection solution for wind turbine blades, minimizing downtime and maximizing turbine output.
The system is also suitable for repairs to similar types of equipment, including fan blades.
Key Benefits
Rapid curing system which can be overcoated in 45 minutes and is fully cured within 65 minutes at 20°C/68°F.
Single product, suitable for use between 5-40°C / 41-104°F, and up to 85% RH.
Can be perfectly contoured, and removes the need for sanding therefore simplifying the application.
Low hazard and solvent-free. Cartridge format avoids the need to handle and mix individual components.
Robust side-by-side cartridge packaging eases in-situ repair of damaged wind turbine blades.
A combination of Belzona 5711 and Belzona 5721 can repair damage and offer long lasting protection against rain erosion and impact damage.
Application Areas
Technical Data
Mechanical Properties
- Shore D Hardness (24 hr cure / 7 day cure)
- 82 / 82
- Barcol Hardness (24 hr / 7 day)
- 83 / 83
- Compressive Strength @ 24 hr / 7 day
- 53.1 MPa (7,696 psi) / 66.4 MPa (9,631 psi)
- Compressive Modulus (24 hr / 7 day)
- 1,270 MPa / 1,340 MPa
- Flexural Strength @ 24 hr / 7 day (ASTM D790)
- 42.13 MPa (6,110 psi) / 57.38 MPa (8,322 psi)
- Flexural Modulus @ 24 hr / 7 day
- 4,293 MPa / 4,302 MPa
- Reversed Notched Izod (ASTM D256, 7 day)
- 5.9 kJ/m² (73.9 J/m)
Adhesion (7 day cure at 20°C / 68°F)
- Pull-Off on GRP Composite (ASTM D4541)
- 8.16 MPa (1,183 psi) — cohesive failure of GRP
- Pull-Off on Grit-Blasted Mild Steel
- 31.97 MPa (4,636 psi) — cohesive failure of Belzona 5711
- Tensile Shear on Grit-Blasted Mild Steel (ASTM D1002)
- 23.33 MPa (3,383 psi)
- Cleavage Adhesion on Grit-Blasted Mild Steel (ASTM D1062)
- 199 N/mm (1,136 pli)
Abrasion & Heat Resistance
- Taber CS17 (1 kg, dry, 24 hr cure)
- 15 mm³ loss per 1,000 cycles
- Taber CS17 (1 kg, dry, 7 day cure)
- 11 mm³ loss per 1,000 cycles
- Heat Distortion (24 hr / 7 day, ASTM D648)
- 46°C (115°F) / 54°C (129°F)
Working Life
- At 68°F (20°C), 50% RH
- 12 minutes
Curing Time
At 68°F (20°C)
- Sandable / hard dry
- 65 minutes
- Overcoat with Belzona 5721
- from 45 minutes
Overcoating Window
- Across application temperature range
- Up to 24 hours maximum overcoat time
- After 24 hours
- Surface must be roughened before applying any further layer
Service Temperature Limits
- Application temperature range
- 41-104°F (5-40°C)
- Maximum relative humidity at application
- 85%
- Heat distortion (24 hr cure)
- 115°F (46°C)
- Heat distortion (7 day cure)
- 129°F (54°C)
Mixing & Application
Product PDFs
Gallery
Videos
Frequently Asked Questions
How fast does Belzona 5711 cure?
At 68°F (20°C) and 50% relative humidity, Belzona 5711 has a working life of 12 minutes and is sandable or hard dry within 65 minutes. It can be overcoated with Belzona 5721 in just 45 minutes, with a maximum overcoat window of 24 hours before the surface must be roughened.
Why is Belzona 5711 supplied in cartridge format?
Belzona 5711 is supplied in a 380 cm³ (600 g) cartridge with a 2:1 mix ratio by volume. The cartridge format makes the product especially easy to apply for in-situ wind turbine blade repairs, including by applicators using rope access. It also avoids the need to handle and mix individual components.
What temperature range can Belzona 5711 be applied in?
Belzona 5711 can be applied across an ambient temperature range of 5°C (41°F) to 40°C (104°F), and at relative humidity up to 85%. This wide application window makes the product well suited for the variable conditions encountered during in-situ leading edge repairs.
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