Frequently asked questions

Frequently Asked Questions


It depends on the type of application. When used as furniture, the panels last as long as any piece of furniture.

Owing to the resin used, the panel is more compact and uniform throughout its thickness, enabling it to be worked by machine/drilled without coming apart. When varnished it is almost certain it will not peel.

Valbopan only produces panels, in the sizes shown on the technical datasheet.

No. Valbopan supplies the panels without a finish

No. The tops have the same finish as the surfaces, and so have the same appearance as them.

A wax, oil or varnish finish can be adapted to the panels.

In damp zones the only finish that endows durability is varnish.

Any varnish suitable for wood can be used on Valchromat panels. Acrylic or aliphatic polyurethane varnishes are preferable to polyurethane varnishes as they do not yellow when exposed to sun.

Yes, we provide panels close to every colour, albeit subject to availability through prior consultation, depending on the quantities required.

Valchromat panels have formaldehyde class E1, in line with the EN 13986:2004+A1:2015 European standard.


No. In Europe asbestos has been prohibited since 2005 through the 2003/18/CE directive.

In indoor applications, the joints can be sealed using a polyurethane mastic.

We do not recommend sealing the panels on a facade.

he expected durability of a ventilated façade made from Viroc panels is the same as a wall built using traditional methods, which is normally considered 50 years.

The vast majority of problems occur in corners and split edges, owing to incorrect installation of the panels. They must be fixed so as to allow the dilation and shrinking of the panel caused by temperature and humidity variations.

Yes, we recommend that the panel be applied on a wooden or metal structure as if it was a lining.

The cement in the panels contains calcium salt, meaning that during the hydration reactions of the cement, salts are produced that rise to the surface (primary efflorescence). When the panels are installed outdoors, if they are not varnished, the salts may migrate to the surface (secondary efflorescence) after coming into contact with rainwater. This is more common in damp and cold climates.

Although the panel has a degree of flexibility, we do not recommend its application in a curve.  We recommend lining curved surfaces using a series of small straight stretches.

The panel density is 1350 ± 100 Kg per m3, so a 10-mm thick panel weighs 13.5 Kg/m2.

There are no specific paints or varnishes for Viroc panels. The panels have an alkaline surface (11 to 13 pH), so usually paints and varnishes suitable for concrete and wood simultaneously have the best results when used on Viroc panels. Solvent-based acrylic resin and aliphatic polyurethane paints and varnishes have shown the best results. Water-based acrylic resin and aliphatic polyurethane varnishes have the least effect in changing the original panel colour

A wood stain is a varnish used to colour wood. If the wood stain is suitable for the surface of the Viroc panel, mentioned in the previous question, it can be used.

Tungsten hard metal circular cutting discs are recommended. Diamond cutting discs are only recommended in saw benches.

A water jet cutter may be used and is as effective as a saw. Laser cutting is also possible, but the edges will have a burned look, on the black coloured panels.

No, the holes must be drilled by the installer.

Yes, a set of very high-quality installers have worked with Viroc.

Viroc panels can be used as a support material for a roof that will be lined. We do not recommend using Viroc panels as the lining of the roof. On flat or near flat surfaces, owing to higher exposure to the sun and puddles of water forming, the dry-damp cycles can lead to the appearance of small cracks in some panels.