We produce and sell SATURE impregnation liquid, surface treatment systems and - of course the know how that goes with it...
“ With SATURE, we strive to develop eco-friendly products within the building material industry, - replacing environmentally damaging products existing on the markets. The underlying thought in everything we do is to offer you a simple and easy alternative that meet your demands for wood products without compromising nature ”
We work on innovative projects to find new uses of silica in order to create sustainable solutions for the future.
We are proud to share the eco-friendly, sustainable technology based on clean natural materials with the purpose of a greener Earth.
Silicate particles agglomerate during drying of the treated wood and are hereafter too big to enter fungal cell wall membranes therefore, not actively affecting the organisms, merely rendering the environment where agglomerated particles are deposited unsuitable for extensive colonization and growth. In decay trials the treated wood is overgrown by fungi, but not degraded, further supporting a non-biocidal mode of action.
The purpose of impregnating wood is to increase the wood’s resistance to humidity. With traditional pressure impregnation, chemicals, often copper, chrome, and arsenic, are pressed into the wood. In Denmark, it is no longer legal to use chrome, arsenic, and a number of other heavy metals to impregnate wood. However, it is still legal to impregnate wood with copper, but it is not possible to separate it from wood impregnated with copper-chrome and can, therefore, not be burned after it has been discarded.
The heartwood is naturally better protected against humidity than the rest of the wood and it is, furthermore, not possible to reach that far into the wood. Some treatment products and processes render limited penetration into the wood and are far from reaching the core. The modification method with modified silicates is able to reach all the way to the heartwood. It cannot enter the core, but it reaches as far as other traditional impregnation methods on the market.
To test the properties of the modification process compared to other traditional products, Preservation Technologies has testing sites in France, Austria, Florida, and Malaysia. It is not the humidity that breaks down wood, but fungi that thrives in places with high humidity and warm temperatures. Denmark is only an ideal place for fungi 4-5 months of the year. To test the wood’s durability in Denmark will, therefore, take up to 12 years and require a good amount of patience.
Wood is high pressure impregnated with an aqueous solution containing silicate. When the water from the treatment solution evaporates from the wood in a subsequent drying process, silicate agglomerates in the wood cell lumina acting as a physical barrier to water penetration (documented by CT scanning). Silicate particles do not penetrate the wood cell walls to any great extent due to
size restrictions in the ring pore membranes. The weight percent gain is approximately 20% in Scots pine sapwood. Heartwood is not penetrated except areas of high porosity such as close to the pith for example.
The silicate treatment has been shown to impart both water and moisture exclusion to the treated wood, which are well-known modes of action in wood modification technology (documented
by Dynamic Vapor Sorption (DVS) and liquid water sorption trials). A reduced water content and/or equilibrium moisture content in the wood makes the substrate less attractive for establishment of fungal growth. DVS data confirms a level of moisture exclusion in the range of 15-25% compared to untreated wood. Uptake of liquid water is roughly halved compared to untreated wood.