Steodur PUR Fine Filler 6D977
Description
Steodur PUR Fine Filler 6D977 is a solvent-free, pigmented, elastic, and lightfast 3-component polyurethane liquid plastic designed for wind turbine rotor blades, specifically for thin, smooth coats. It is used for fine filling and leveling of surfaces, sands well, and can be finished to a pore-free finish, thus forming a durable, uniform base for subsequent coating applications. It is applied with a putty knife; by adding 0.5–2.5% accelerator, the reaction time can be adjusted to suit the processing conditions.
Recommended use
- Fine-finishing and Leveling of Rotor Blade Surfaces on Wind Turbines
- Production of thin, smooth, and pore-free layers as a base for further coating layers
- For use on fiberglass-reinforced plastic (FRP) and on load-bearing underlying coatings (e.g., gelcoat, primer)
- Final Preparations Before Applying Primer and Topcoat
Product details
- Chemical composition: Polyurethane (solvent-free 3-component system)
- Hardener System: Steodur PUR Hardener 7D202 │ 7D202-SW (black)
- Accelerator: Steodur PUR Accelerator 6D972
- Characteristics: solvent-free, pigmented, elastic, lightfast
- Color: RAL 9018 (other colors available upon request)
- Finish: glossy
- VOC content: approx. 8 g/l (mixture); Component A approx. 27 g/l, Component B approx. 0 g/l
- Solids: approx. 99% by weight (mixture)
- Density: approx. 1.90 g/cm³ (mixture) · DIN EN ISO 2811-1 · +20 °C
- Rotational viscosity: approx. 25,000 mPas (mixture) · DIN EN ISO 2555 · +20 °C
- Mixing ratio: 5 : 1 by weight │ 2.5 : 1 by volume; accelerator addition 0.5–2.5%
- Pot life: > 8 hours (10 kg work package, without accelerator)
- Processing time: approx. 3 min (500 g of mixture with 1.5% Accelerator 6D972)
- Drying: sandable in approx. 60 min (with 1.5% Accelerator 6D972); recommended grit size 80–120
- Application method: Putty knife
- Verarbeitungsbedingungen: +8 °C bis +30 °C, < 85 % rel. Luftfeuchte, Objekttemperatur mind. 3 °C über Taupunkt
- Theoretical coverage: approx. 2 kg/m² per 1,000 µm of dry film thickness (mixture)
- Shelf life: approx. 12 months in the original, unopened container at temperatures between +4 °C and +40 °C; protect from frost and moisture
- Compatible Systems: Can be combined with numerous other products from the Bergolin wind power portfolio to create a coordinated coating system
Advantages at a glance
- Solvent-free 3-component PUR fine-fill putty with approximately 99% solids and only approximately 8 g/l VOC
- Specially designed for thin, smooth layers—easy to sand and can be finished to a non-porous finish
- Provides a durable, uniform base for the subsequent coating system
- Can be sanded after only about 60 minutes—reduces turnaround times in sheet production
- Reaction time can be flexibly controlled by adding 0.5–2.5% of the accelerator
- Permanently elastic and lightfast—reliable properties throughout its service life
- Black hardener makes mixing errors visible and improves process reliability
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