Weathering to silver-grey

Nature Made

Nature inspires us in everything we do and has made us who we are. With the help of nature and innovative technology, we have created a unique, environmentally friendly wood protection that gives building cladding, decking and docks an attractive silver-grey patina. Just like beautifully aged wood. We call this Designed by Nature


Once the SiOO:X impregnation system has been applied, when exposed to moisture the mineral silicate in the impregnated timber substrate begins to cure by reacting with atmospheric carbon. During this curing reaction a network of silica crystals starts to be formed and this process continues for up to three years. The result is that the timber surface is toughened and an even accelerated weathering takes place. This is a permanent change.


The cure rate is timber species and temperature dependent and will proceed very slowly in cold exterior conditions.


Weathering in different timber species

Regarding timber species, in warm exterior conditions with sufficient exposure to moisture the curing process can proceed rapidly in engineered timber such as ThermoWood and its variants. This is also the case with Kebony and the beginnings of a silver-grey lustre can be seen within a two month period.


DuraWood (Thermo Ayous) vertical louvres, factory treated, a short while after construction.


Natural timber species show varying rates of curing to the point where a silver-grey nuance developes.


Cedar, in good curing conditions, will develop to a silver-grey appearance in a six to twelve month period. Examples of cedar projects that have developed in this timescale can be seen in the cladding gallery. One such example is this English cedar clad house on the Somerset levels at the two month curing stage and well on the way to a silver-grey surface


An example of a Western Red Cedar clad house located in Northumberland where the curing has reached a mature stage.


Siberian Larch cures very gradually to a fully developed silver-grey lustre. The following south facing sawn surface samples sited in the highlands of Scotland, courtesy of Russwood Limited, show a typical progression over a seven month period from the point of application of SiOO:X.


Siberian Larch projects where the curing has advanced to give a well-developed silver-grey appearance can be seen in the project gallery.


For the natural durable timbers, the expectation is that the curing process will have developed at the one-year point to a stage where a silver-grey appearance is noticeable.

Read more about Sioo:x technology


Tests and proofs


SiOO:X Properties



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