Wood that performs. Ages beautifully. In every climate.
Patented silicon-potassium technology that crystallizes within the wood's cell structure, forming a permanent silica network. Protects against rot, mould and UV without restricting the wood's ability to breathe. Developed through 30 years of Swedish research, verified in over 10,000 projects globally. SiOO:X Panel Colours System with six matched tones for specifiable precision.
SIOO:X PRO
YEARS OF SWEDISH RESEARCH
VERIFIED PROJECTS GLOBALLY
YEARS BETWEEN MAINTENANCE
Where do you want to start?
I'm treating my house or deck
Guides, coverage, prices and ready-made packages for doing it yourself.
I'm an architect or industrial applicator
Specifications, colours, fire protection, EPD and technical advice.
30+ years of research
Developed at Swedish universities with world-leading silicon chemistry.
10,000+ projects
Verified performance from private decks to large-scale facades.
NCS/RAL matched
Six predefined tones for maximum specifiable precision.
Fire class B-s1,d0
Highest possible fire protection for timber facades with Burnblock®.
INSPIRATION
Visionary architecture
Escapade Silverstone
Escapade Living · Northamptonshire, Storbritannien
SUSSEX HERITAGE AWARD 2025
The Barns
Randell Design Group·West Sussex, Storbritannien
SIOO:X WOOD PERFORMANCE
Patented technology
Penetration
Silicon molecules penetrate deep into the wood's cell structure, forming permanent bonds at the atomic level. The result is protection that becomes part of the wood – not just a surface.
Bonding
The silicon network continues to grow and strengthen over time. Every time the wood is exposed to moisture, the process that reinforces the protection is activated.
Network
Tested and certified for extreme conditions. Performs consistently from -40°C in arctic environments to +60°C in tropical climates.
Protection
Complete hydrophobic protection system active
PERFORMANCE
SCIENCE
Proven through independent research
SiOO:X technology has been tested and validated by leading research institutes worldwide, including SP Swedish Technical Research Institute and BRE Group in the UK.
Inside the wood
Not a surface – protection that goes into the wood
Film-forming systems stay on the surface and crack. SiOO:X is not a surface coating – the silica technology penetrates the wood structure and builds protection from within.
AI-RENDERED VISUALISATION
Facade Transformation
From uneven aging to uniform elegance
See how a timber facade transforms from uneven, patchy weathering to a perfectly uniform silver-grey patina with the SiOO:X system.
Before
Uneven natural weathering
After
SiOO:X-treated facade
Drag the slider to compare
Renewable World
Wood builds the cities of tomorrow
From vision to reality. See how architects worldwide choose timber facades treated with SiOO:X to create sustainable buildings that age with dignity and contribute to a climate-positive future.
Panel Colours System
Our beautiful SiOO:X Panel Colours
Skip the weathering process. SiOO:X Panel Colours gives you the desired silver-grey tone from day one – with the same long-lasting protection. All shades matched to NCS and RAL. Ideal for applicators who demand repeatability and precision on large-scale projects.
Clear
Light Grey
Oyster Grey
Mid Grey
Almond Brown
Black Xtreme
Panel Colour Box
Order your premium Panel Colour Box with total collection
Colour sample box with SiOO:X wood samples showing natural ageing. Perfect for client presentations and project specifications.
Order Panel Colour Box
SiOO:X + Burnblock®
Wood that withstands fire
The unique combination of SiOO:X silicon-potassium technology and Burnblock® fire protection gives wooden facades the highest possible fire rating – without compromising aesthetics or environment.
B-s1, d0
Fire rating
Highest for wood products
30+
Years
Documented durability
100%
Water-based
Environmentally adapted formula
EN 13501
Certification
European standard
How it works
Burnblock® penetrates deep into the wood and forms a protective barrier that creates an insulating char layer during fire. Together with SiOO:X surface protection, the wood receives complete protection against both fire and weather.
Fire rating B-s1, d0
Highest possible classification for wood products according to European standard EN 13501-1.
SP FIRE 105
Approved for external facades according to the Swedish test program for fire spread.
Preserves the natural beauty of wood
Invisible treatment that does not affect color, texture or silver-grey patina.
Ideal for
Meets requirements for buildings over 8 floors according to Swedish building regulations.
Schools, nursing homes and other buildings where fire safety is critical.
Enables wooden facades in densely built areas with high fire requirements.
For architects & specifiers
The tools you need
Download EPD, generate a spec clause, find the right panel colour and book a CPD webinar – straight from the homepage.
Specifier's Library
Spec clauses, EPD, fire and UV data plus BIM materials.
Panel Colours
NCS/RAL-matched colours for your project.
Spec Generator
Create a project-specific specification clause in under a minute.
Arkitektcase: Escapade Silverstone
Dokumenterat referensprojekt – systemval, patina 0–15 år och livscykelkostnad.
CPD webinar
Book training for your team or your clients.
Patina over time
Watch the surface age with dignity
Drag the slider to see how SiOO:X develops an even silver-grey patina – without maintenance, without hiding the wood grain.
Material specification
Material specification for wood protection
Specify SiOO:X as the wood protection treatment in your project. We provide complete documentation – material spec, EPD, CE marking, fire class B-s1,d0, NCS/RAL-matched colours and application protocols – so you can write the right NBS/CAWS clause and material schedule.
Material spec & NBS clauses
Ready-to-use specification text for facade, decking and interior timber – aligned with UK and EU practice.
EPD & sustainability docs
Verified Environmental Product Declaration per EN 15804. Contributes to BREEAM, LEED and Nordic Swan certification.