As result of technological developments in recent years, we can have one coating with many advantages, including: protection at all levels, maintenance and decoration of wood.

Wood composition is constituted by polysaccharides of celullose (50%) with structural function, polymer lignin (25%) giving rigidity and polysaccharides hemicellulose mixture of different monomers (25%) that serves as coating.

Constitutional characteristics of wood are: 

The wood density is the relationship between volume and weight. This will vary depending on the humidity from 0 - 30%. As the distribution is not homogeneous, the volume also depends according to the area, for this reason is taken as the normal value 12% humidity.

Hardness is the resistance of wood to be penetrated by another or what is the same as the inverse of the depth, measured in mm-1

Porosity is the property that bodies have to pass a fluid therethrough. A higher humidity less porous (wood)

The density, hardness and porosity of wood will depend on the climate variables and the growth time. With these three parameters we can define the following types of wood.

Very soft


Semi hard


Very hard

0,2 – 1,5

1,5 – 3,0

3,0 – 6,0

6,0 – 9,0

> 9,0

The hard woods sually come from slow-growing trees, therefore are harder and better able to withstand inclement weather, as walnut, oak, cherry, chestnut, mahogany, etc.

The soft woods come from coniferous trees of rapid growth, therefore are lighter, short-lived and cheaper, as pines, firs, cedars, etc.

The wood is a hygroscopic material, that absorbs and releases water (moisture), softwoods have over 15% and 12% hard on. Everything will depend on the conditions of their origin (temperature and humidity). For this reason to get a good coating, we need to know: moisture, shrinkage, porosity, exudation of woods.

The wood contraction will be determined by the loss of moisture, this can cause cracks.


The word comes from German Glasur, which means glaze.

Glaze is a pictorial technique, whereby layers overlap, so that are transparent.

The lasures was born as a protective transparent coatings to the wooden houses, to preserve, protect, beautify and enhance the natural characteristics of wood.

The lasures are transparent coatings for wood, but no varnishes or paints, that depending on their formulation give high resistance to UV protection, elasticity, water repellency and have insecticidal / fungicida. In this way we beautify and protect wood that long time.

We could say that lasures protect and decorate of wood.

The Lasures differ the other coatings by:

1.- It has a finished open porouse.
2.-They are transparent colors: light-resistant UV protection.
3.-They have protection against biological agents (biocides).
4.-They repel water (hydrophobic).
5.-They have power of penetration.

The lasures can be classified in two ways in accordance with:

 Depending on the amount of solids

1.- The unstructured lasures have amount of solids between 30 - 35%, they are impregnant type (which penetrates through the pores), matt finished, with low viscosity.
2.- The structured lasures have quantity of solids between 45 - 55%, they are of thick, saturated and bright finished, with high viscosity.

 Depending on the type of solvent

The composition of lasures depend on the solvent used: base solvent (SB) or water (WB).

1.- Organic solvents are traditional hydrocarbons, aliphatic and aromatic, which adjust the viscosities of the application. In this case are resins that are dissolved in a solvent.

2.- Due to regulatory changes solvents (VOCs). Lasures have been developed to water, which are dispersions and emulsions. The raw materials are to be chosen carefully to maintain the balance of the dispersion.

The lasures have the advantage of non-toxicity, durability, cleaning jobs, no flammability, fast drying and odor unpleasant.

The maximum content of COV about lasures in accordance with Directive 2004/42/EC.

Type of lasures      g/L         
Solvent     400
Water     130
Solvent maximum thickness     700
Water minimun thickness     130

Differences between base water or solvent:

Type Surface tension Rheology Performance Drying Drying time
Solvent 0,030 N/m Newtinian Capillarity Oxidation Fast
Water 0,078 N/m Thixotropic Absorption Coalescence Slow