Tenzi Derast concentrate, 10 L is a professional-strength descaler and rust stain remover formulated to dissolve mineral scale, limescale and rust residues from a variety of hard surfaces. Supplied as a concentrated liquid, it is intended to be diluted according to the type and severity of deposits and can be used on sanitary fittings, tiles, boilers and metal parts to restore surface appearance and improve system efficiency.
Advantages
Derast concentrate delivers effective removal of carbonate and iron-based deposits when applied at the recommended dilution rates. Its concentrated formulation reduces storage volume and transport costs compared with ready-to-use products, and it can be adapted for light maintenance or heavy descaling tasks. The product is compatible with many common hard surfaces when used correctly and helps remove visible stains while reducing scale-related performance issues.
Suitable for
- Sanitary ware and faucets with limescale and rust spots
- Ceramic and porcelain tiles in bathrooms and kitchens
- Domestic and small commercial boilers and heating elements (descaling)
- Metal parts and tools affected by light to moderate rust deposits
When it may not be suitable
Derast concentrate is an acidic descaling product and may not be suitable for use on acid-sensitive materials such as natural stone (marble, limestone), some metals prone to etching, painted or anodised surfaces unless compatibility is confirmed first. It is not intended for direct application to persons, fabrics or porous textiles and should not be used on surfaces where dilution and rinsing cannot be achieved.
Key specifications
- Formulation: concentrated liquid descaler with rust stain removal properties
- Volume: 10 litres
- Typical application areas: sanitary fittings, tiles, boilers, metal parts
- Dilution: adjustable depending on deposit severity (follow label instructions)
- Storage: store in a closed original container away from direct heat and frost
How to use
Prepare the working solution by diluting the concentrate according to the type and intensity of deposits, as indicated on the product label or technical data sheet. Apply the diluted solution to the affected area, allow sufficient contact time to dissolve scale or rust, then mechanically assist removal with a brush where necessary. Thoroughly rinse the treated surface with potable water after cleaning and neutralise residues if required. For closed systems such as boilers or heat exchangers, follow standard flushing procedures and safety guidance for descaling operations.
What to consider before purchase
- Confirm surface compatibility (avoid acid-sensitive materials such as marble and certain metals)
- Ensure appropriate dilution and application equipment is available
- Plan for safe storage and handling due to acidic nature
- Check that rinsing and waste disposal comply with local regulations
Usage recommendations
Use personal protective equipment (gloves, eye protection) when handling and applying the concentrate. Test on a small inconspicuous area before full application. Follow label instructions for dilution, contact time and rinsing to achieve optimal descaling and rust removal while minimising surface damage.
