How to clean and impregnate your decking with Sisel ns – step by step

What is wood protection and why choose it for decking?

Wood protection is a treatment that penetrates the surface of the wood and makes it more resistant to moisture, dirt and growth. By filling cavities in the wood with a water-repellent material, the surface becomes dirt-repellent, easier to wash and more durable over time. For decking, it is often recommended to combine cleaning (decking washing) with impregnation for best results.

Frequently asked questions about cleaning and impregnating decking

How do I clean the decking before impregnation?

Thorough cleaning is essential. Follow these steps:

• Remove furniture, pots and loose objects.
• Dampen the wooden surface and brush away loose grit and dirt with a stiff brush or broom.
• Mix the decking cleaning concentrate according to the instructions on the packaging in a can or sprayer and apply evenly over the surface.
• Leave on briefly according to instructions (usually a few minutes), scrub with a brush against the fibers to remove algae and green growth.
• Rinse thoroughly with plenty of water — a pressure washer can be used from a distance but be careful not to damage the wood fibers.
• Let the decking dry completely before impregnating (usually 24–48 hours depending on the weather and type of wood).

How does the deck cleaner concentrate work?

The concentrate comes in a can that you fill with water and shake. When mixed, the cleaning components are activated, dissolving dirt, algae and other growth. The advantage of concentrate is that it is easy to store, transport and adjust the dilution according to the degree of dirt.

When should I impregnate after washing?

Wait until the wood is completely dry. Moisture in the wood will prevent the impregnation from penetrating properly. A recommendation is at least 24 hours in warm, dry weather and up to 48 hours if it is cooler or more humid. Check the moisture content of the wood if you are unsure.

What tools do I need?

• Stiff brush or deck brush
• Bucket or can for dilution
• Sprayer or roller for applying impregnation (or brush for edges)
• Protective equipment: gloves and goggles
• Water hose or pressure washer (with caution)

Is the product safe for the environment and health?

Products with natural ingredients often have a lower environmental impact. Wear protective gloves and avoid contact with skin and eyes. Cover nearby plants and flush away any residue that ends up on the ground. Always read the safety data sheet on the packaging for exact recommendations.

Step-by-step guide: Clean and waterproof your decking

1. Prepare the area

Move furniture away, sweep away loose debris, and identify spots or areas with heavy growth.

2. Mix the decking cleaner

Fill the can with water according to the instructions on the packaging and shake well. Adjust the dilution according to how dirty the deck is.

3. Apply and scrub

Spread the solution evenly and scrub with a brush until dirt and algae are loosened. Leave to work briefly and then rinse thoroughly.

4. Let dry completely

Give the decking time to dry completely before proceeding with the impregnation. It is a good idea to check a piece of plank to ensure that there is no surface moisture left.

5. Apply the wood protector

Impregnate according to the product instructions. Wood preservative should penetrate the wood, fill cavities and make the surface more water-repellent. Apply evenly with a roller or brush and treat edges carefully.

Maintenance tips and lifespan

• Repair and clean regularly to extend the life of the protection.
• Reapply impregnation every two to five years depending on exposure and wear.
• Local wear spots can be spot treated without the entire surface needing to be re-treated.

Why choose a combination of deck cleaning and impregnation?

By first cleaning the surface of dirt and growth, you ensure that the impregnation penetrates better and provides longer protection. A good wash also makes the wood look fresher and the color/shade is more even after treatment.

For a smooth, comprehensive solution that both cleans and impregnates effectively, the decking cleaning concentrate and impregnation package is a smart choice:

Quick advice before you start

• Always test on a small area first.
• Work in the shade or when the surface is not hot to avoid quick-drying solutions that cause stains.
• Follow the manufacturer's instructions for dilution and safety.

With the right preparation and a good product, your deck will be cleaner, easier to maintain and more resistant to weather and dirt. Good luck with your treatment!