Sia 7940 siaair – siafast discs
Whether it’s scuffing, fine sanding or preparation for polishing – the improved technology of 7940 siaair is the key to a perfect finish in damp sanding applications.

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Whether it’s scuffing, fine sanding or preparation for polishing – the improved technology of 7940 siaair is the key to a perfect finish in damp sanding applications.
Start with the surface, the existing finish and the way the space or equipment is used. Our team can help you work through product choices and the requirements for your project.
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Identify the material, its condition and the work you’re planning.
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| Abrasive format | siafast discs |
|---|---|
| Grit type | Aluminium oxide |
| Backing | Knitted fabric with foam backing |
| Coating | Special process |
| Bonding | Resin over resin |
| Recommended applications | Matt finishing of conventional old and new varnishes as well as composite materials Fine sanding of primer filler in hard-to-reach areas Preparation for polishing on high-gloss surfaces |
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Sia 7940 siaair – siafast discs
Technical data sheet – Sia 7940 siaair – siafast discs
Read the full product requirements, application instructions and limitations.
Automotive product brochure
Read the manufacturer’s instructions and product information.
Check the product label and current manufacturer documents for the exact component, colour and region before use.
Full product details, applications & manufacturer specifications
Whether it’s scuffing, fine sanding or preparation for polishing – the improved technology of 7940 siaair is the key to a perfect finish in damp sanding applications.
Recommended uses
Ask our specialists about product suitability and availability. Refer to the manufacturer’s current technical information for the selected system.
Automotive SandingFeatures
- Low clogging thanks to damp sanding
- High stock removal rates and excellent finish
- Highly adaptable to contours, curves and profiles
- Pressure-equalising foam gives perfect surface finish
- Waterproof and washable
- Resistant to silicon remover
- Abrasive format
- siafast discs
- Grit type
- Aluminium oxide
- Backing
- Knitted fabric with foam backing
- Coating
- Special process
- Bonding
- Resin over resin
- Recommended applications
- Matt finishing of conventional old and new varnishes as well as composite materials Fine sanding of primer filler in hard-to-reach areas Preparation for polishing on high-gloss surfaces
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