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Sansin Wood Sealer

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PRODUCT 3.78l tin 18.9l
Wood Sealer £16.99 £15.63

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(exc VAT) £0.00 (inc VAT) £0.00


Sansin Wood-Sealer is a water-borne penetrating sealer that aggressively repels water while allowing wood to breathe. Over a short time, the wood will weather uniformly to a beautiful silver grey tone. Because it erodes gently with time, maintenance is easy - just apply a fresh coat of Wood-Sealer.

Recommended for use on new and old wood surfaces such as decks, fences, siding, timbers and roofing shingles or shakes.

3.78L tin = 9 - 18m2 coverage, depending on wood porosity

At a glance

  • Transparent, water repellant solution for above ground wood substrates
  • Allows wood to naturally weather to a silver-grey finish
  • Penetrates and bonds of substrate - protecting the wood from water damage and contaminants
  • Easy to use - simply rinse off with water
  • Biodegradable with zero VOC
  • Recommended for new and existing wood surfaces such as decks, fencing and cladding
  • 3 Year Limited Warranty

Premium protection, with the look of naturally-weathered driftwood

This 0-VOC water-borne penetrating sealer aggressively repels water while allowing wood to breathe. Over time, the wood will grey naturally to a driftwood tone from exposure to the sun - while retaining its water-repellency to protect against weathering and wood rot.

In fact, Sansin Wood-Sealer easily surpasses the ASTM 4446, the standard industry benchmark for water repellency. Test results show that, on average, one application of Sansin Wood-Sealer reduces water absorption by 84% and swelling by 72%.

Sansin Wood-Sealer dries clear and will not peel and can be used for interiors as well as exteriors. A 3-year limited warranty on Sansin Wood-Sealer is available on projects where it has been applied to properly prepared surfaces as per directions for use. Wood-Sealer is ideal for log homes, decks, fences, wood shingles, gazebos, yard furniture and wood siding.

One question we're often asked is whether you should use a water based or oil based coating when protecting wood surfaces. With Sansin Enviro Stains, you can have the best of both worlds.

Enhanced durability and moisture control

Sansin lets wood 'breathe' more freely, dramatically improving dimensional stability and allowing wood to adjust naturally to moisture levels in the environment. Once it bonds with your wood, Sansin forms a long-lasting shield that aggressively repels condensed water while allowing water vapour to escape. 

Protection from UV radiation

As well, the paraffin waxes used to protect against water in many water and solvent-based coatings are easily damaged by exposure to UV radiation - just 5 hours of direct sunlight can reduce water repellancy by over 60%. Like your own skin, your home needs dependable UV protection. Sansin's modified natural oils and resins are impregnated with special UV protectants so every exposed cell of your wood is protected. Because of their unique formulation, Sansin Enviro Stains also protect naturally against wood decay. 

Sansin Enviro Stains are designed to keep your wood healthy, just as Mother Nature intended. Whether it's your home, your deck or your furniture, Sansin provides the long-lasting, beautiful protection your home deserves.

Every wood coating needs to be maintained - it's just easier with Sansin.

Where successive film-build coatings can darken and peel, Sansin is design to wear gently over time. Keeping your home protected involves only a simple cleaning and maintenance coat, applied as needed.

Article - What is weathering?

Read more


  • Number of coats recommended: 2
  • Drying time (to touch at 20ºC): 48 hours
  • Time to re-coat (between applications at 20ºC): 30 minutes, no longer than 5 hours
  • Usage: exterior wood e.g. cladding, decking, fencing, shingles and shakes
  • Recommended application: for best results apply to timber with a sawn textured face or sand surface using an orbital sander and 60-80 grit sandpaper

Approximate Coverage

A 3.78 litre tin will cover 9.3-18.6 square metres for a single coat.

Coverage will vary depending on type of wood, age and surface structure.

Maintenance Cycle

3-6 years on vertical surfaces (cladding/fencing).

2-3 years on horizontal surfaces (decking).

How frequently maintenance coats are required will depend on the quality of prior preparation, quality of application and weather exposure levels.


Three Year Limited Warranty. Details provided upon request. Conditions of Sale - In lieu of all warranties, expressed or implied, the manufacturer and sellers only obligation shall be replace such quantity of product as is proven to be defective. Seller or manufacturer shall not be liable for injury, loss or damage connected with the use and/or handling of this product. User should determine suitability of this product for the intended use before applying it. User assumes all risk and liability in connection therewith. 

Application Instructions


Substrate must be dry
Temperature above 10°C / 50°F
Spray vegetation with water or shield off before and during application
Protect bordering areas with drop sheets and/or tape off with poly
Do not allow this product to contact metal, fabric, floor coverings or outdoor furniture 


  • Apply directly onto clean wood
  • For existing applications use Sansin Wood Cleaner to restore wood
  • Stir or shake well before use
  • Apply be sprayer, dipping, brush or roller
  • Apply liberally - do not allow to puddle
  • Back brush to remove puddles and runs
  • Do not dilute
  • Do not apply if rain is expected

Clean up - Clean with soap and water


Taking advantage of nature

Modified natural oils and resins are carried deep into the wood's cell structure using one of nature's commonplace miracles - water. As the water evaporates, Sansin bonds directly with a wood substrate, forming a tough, durable barrier that won't crack, peel or blister. 

Sansin Enviro Stains are created using the same principle used for thousands of years. In fact, the ancient people of Norway took resin and gums from the heartwood of trees, warmed it and applied it to their Stave Churches with a broom, buildings which are still standing to this day. 

Wide spectrum of natural colour tones

With Sansin Enviro Stains, not only can you protect your wood naturally, you can also invite the beauty of nature into your life. Sansin's collection of 79 unique colours is inspired by the stunning beauty of our world - deep blue of the summer's sky, the rich yellows of a ripe harvest and the pure tones of a sandy beach. 

Natural protection

Sansin doesn't just stain your wood; it actually becomes an integral part of your wood's cell structure, protecting it naturally from within. Because Sansin stains are water-borne, they can be applied even to wood with a high moisture content, with no harmful impact to the environment.

The science behind healthy wood

Wood is a tremendously versatile material - and as long as it's protected, a very strong and durable one. Water, ultraviolet (UV) rays and fungi can all seriously damage your wood. 

Traditional petroleum and acrylic-based coatings protect wood by forming a surface film which repels water and UV rays. Unfortunately, this tends to prevent evaporation, trapping moisture in the making it prone to decay. 

Committed to conservation

Sansin Enviro Stains are low-odour, easy to use, maintain, and their easy on the environment. Sansin's commitment to conservation is paramount and reflected both in their products and business practices. 

  • FSC
  • PEFC
  • Trada member
  • Responsible purchaser
  • Cedar Shake & Shingle Bureau
  • Secured by