Alumet uses special machines and tools to remove the top layer from profiles or sheets. By doing so, we can remove extrusion lines so that a smooth, silk-like surface remains after etching. This treatment is generally used for indoor applications with most need for a smooth surface, such as architectural lighting, kitchen and furniture profiles.

Aluminium grinding

The grinding of metals involves the following process steps: course grinding, middle-fine grinding and fine grinding. Aluminium manufacturers usually supply semi-finished products with such good surface condition that the first two processing steps can often be skipped altogether. A course grinding step is usually only required to smooth out any major damage that has occurred.


Download the STABU specification for anodisation of aluminium curtain wall / windows & doors / façade cladding. Can’t find what you’re looking for? Call us +31 (0) 76-5043130 or send an e-mail to



Anodised aluminium used in architecture requires very little maintenance. The anodising layer consists of metal, aluminium oxide and is hard and robust. Maintenance is therefore understood to mean: cleaning of the product. A clean anodised aluminium surface has a very long lifespan. Under normal conditions, it can easily last 80 years, without losing its gloss or colour (e.g. the electrolytically dyed layers).

Cleaning instructions

20 Or 40 year guarantee

Alumet B.V. hereby declares that the anodising activities that it has performed meet the QUALANOD requirements, class 20 mu or 25 mu, which Alumet B.V. and the client had agreed upon in writing. This means that the anodised components will be free of any corrosion and will not contain any cracks, blisters or filiform corrosion. Corrosion on the unprotected and untreated cut will not affect the adjacent anodising layers. The natural and electrolytically coloured components will also not be subject to any discolouration when exposed to sunlight.

Guarantee 20 muGuarantee 25 mu

Projects with Grinded pretreatment