Sioo:X Vs OrganoWood- Which pre-ageing treatment will provide the best overall performance?
Both clear wood treatment systems are designed to create a natural, weathered grey appearance on timber, but they differ in their approach and specific properties.
Sioo:X relies on a superficial treatment with silica compounds.
OrganoWood involves a deeper impregnation with a silica-based product.
Both offer durability and aesthetic appeal, but Sioo:X provides even weathering and longer colour change, while OrganoWood provides a faster and more even colour change and is a harder, smoother surface with better protection against biological growth.
Comparison: Sioo:X Vs OrganoWood
Feature | Sioo:X | OrganoWood |
Country of Origin | Sweden | Sweden |
Technology Base | Potassium silicate (mineral-based silicate technology) | Silicon-based with patented modification of wood fibres using natural silica and bio-based additives |
Product Range | 2-part system: Wood Protector + Surface Protector | 2-part system: Wood Protection 01 + Surface Protection 02 |
Intended Look | Silvery-grey, weathered wood appearance over 6–12 months | Silvery-grey patina within weeks to months, depending on UV exposure |
Lifespan / Durability | Up to 10 years with proper application | Up to 10 years; reapplication, subject to exposure, may be required after 5 years |
Application Process | Two coats of Wood Protector, then one or two coats of Surface Protector after drying (up to 4 weeks between stages) | One coat of each of Protection 01 and 02, applied the same day (typically within 1–2 hours) |
Drying Time | Wood Protector: 1–2 days. Surface Protector: 1–2 days. Full cure: up to 4 weeks | Each coat: Dry to the touch in 1–3 hours. Full cure: 24–48 hours |
VOC Content | Very low / none | Very low / none |
Water Repellency | Yes, after curing | Yes, after curing |
Biocide/Fungicide | Contains potassium silicate; pH deters fungi. | Contains natural biocides from the wood fibre modification process |
Maintenance | Surface Protector can be reapplied to boost water resistance every few years. | Reapply both coatings after 5 years or sooner, depending on exposure. |
Surface Compatibility | Softwoods (e.g., pine, spruce), thermally modified woods | Softwoods (especially pine, larch, D. Fir), some ThermoWoods; not recommended for natural oily/exotic woods.
|
Environmental Impact | Eco-certified, non-toxic, biodegradable | Eco-labelled, Swan-certified, non-toxic, biodegradable |
Coverage (Approx) | 8–12/m² per litre full system (depends on wood porosity) | 8–10/m² per litre full system (depends on wood porosity, i.e. softwood or hardwood) |
Performance Analysis
Weathering Appearance
Sioo:X | Gives an even weathered silver-grey look over 6–12 months. |
OrganoWood | Can develop silvering more rapidly. |
Protection
Both provide UV and water protection.
Sioo:X | Has slightly better performance against algae and mildew due to the pH-altering silicate matrix.
|
OrganoWood | Relies more on fibre modification and is very water-repellent to protect against surface fungal algae. |
How Easy Is It To Apply?
Sioo:X ,, increasing; increases | Requires more time between coats and longer total treatment time (up to 4 weeks if following instructions precisely increase application costs). |
OrganoWood | You can apply both coatings in one day. |
Summary: Which is Better?
Criteria | Winner |
Uniform Silvering Finish (Exposure dependent) | Tie |
Application Time | OrganoWood |
Initial Cost | OrganoWood |
Longevity / Durability | Tie |
Eco Credentials | Tie |
Maintenance Needs | Sioo:X |
QTD Factory application
Based on QTD’s professional knowledge and application using both products, they will be continuing with Organowood based on a reliable supply of product to meet customer lead times. Their continuing expertise in this field includes texturising the surface that prepares all UK and ThermoWood timbers to accept the treatment, allowing it to perform at its best.
👉 Visit qtdgroup.com or speak to our technical team for expert support and tailored product advice.
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