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Fladder® sanding

- the way to a better finish

It is a well-known fact that a wooden surface becomes rough after sealing.

The reason for this is that fine fibres are created by ordinary wood sanding procedures, for instance using a widebelt sander.

Because of the pressure of the abrasive material against the surface, the wood’s fibres are severed, resulting in microscopic fibres creating a ’fuzzy’ surface.

During the following sealing process, tension is generated in the fibres causing them to rise, and thereby giving the surface a rough feel.

The presence of these fibres must be minimised or efficiently removed before or after the sealing process.

The solution is to use the FLADDER® sanding system - an innovative sanding method based on sanding principles which are fundamentally different from those of traditional sanding methods.

Rather than sanding with a constant pressure against the surface, the FLADDER® sanding system is based on a principle by which the sanding aggression is created by the sanding tool’s rotating speed.

FLADDER finishing is a non-aggressive type of sanding which removes the fibres without creating new fibres, preserving the part’s dimension


Figures A and B show a wooden surface sanded in the normal way before and after sanding with the FLADDER® sanding system.

sanded microscop fibres       Fladder finish microscop nofibres

A: Before Fladder® sanding                       B: After Fladder® sanding

Fladder sanding- provides significant benefits:

● Up to 30% reduction in sealer/primer consumption

The figur below shows the difference between a normal, sealed surface and a surface sealed after a FLADDER® finishing.

On the FLADDER® finished surface, the amount and length of the fibres are reduced.

This means that

  • less sealer is required to effectively seal the surface,
  • less sanding is required, and
  • the surface becomes more uniform.


Sealed surface

Normal sealed surface                                    Sealed surface after Fladder® finish.

● Sharp edges are rounded slightly.

Sharp-edged parts often cause problems in connection with sealing or sealer sanding.

The sealing layer on sharp edges is very thin, and as a result the sanding often penetrates it.

Figure D below shows a profile with sharp edges.

On the surface treated with FLADDER® finishing, the edges have been rounded slightly, but not so much as to cause the part to lose its definition.

As a result, the sealer is able to better enclose the edge, and the risk of sanding through has thus been minimised.

This problem occurs most often on stained surfaces.

● Stain is more uniformly absorbed.

The different fibres on a sanded surface do not always absorb stain uniformly. The look of the surface vary in areas where the stain appears darker.

With a FLADDER® finish sanding the material is processed in such a way as to open the wood’s surface.

This makes the stain penetrate more evenly into the surface and improves the wood’s structure.

This is shown in the Figure below.


wood stained surface