All about wood preservative

Wood outdoors is exposed to moisture, dirt, algae growth and the sun's damaging UV rays. A good wood preservative helps preserve the wood's lifespan, makes the surface easier to keep clean and can change its appearance to a beautiful gray patina over time. Here you will find answers to common questions about wood preservative, where to use it and how to get the best results.

What is a wood preservative?

A wood preservative is a product that penetrates the surface of the wood to provide water repellency, reduce growth (moss, algae) and protect against wear. Products can be oil-based, water-based or silicon/silicate-based. Silicon-based wood preservatives often form a thin, water-repellent surface that is environmentally friendly and can give a silver-gray appearance after exposure to sunlight. It is important that they are Nano Silica as this is water resistant.

Can wood protection be used indoors?

Many wood protectors are designed for outdoor use. For indoor use, you should check the product's technical data:

• Check intended use — is the product approved for indoor use?
• Review ventilation and odor requirements — even environmentally friendly products can emit odors during drying.
• For painted or matte surfaces indoors, special indoor varnishes or oils may be more suitable.

If you are looking for a safe option for indoor use, look for low or no VOC claims and follow the instructions on the product sheet.

Is wood protection suitable for burial (below-ground)?

Products marketed as decorative or surface-preserving wood preservatives are usually not intended for constant ground contact. For buried structures (posts, ground anchors), specially preserved wood or special pressure-impregnated treatments intended for ground contact and resistance to rot are required.

Summary:

• Surface-preserving silicon-based products provide protection against moisture and fouling but are usually not approved for long-term ground contact.
• For burial: use wood approved for ground contact or specially treat according to the manufacturer's recommendations.

How do you treat a fence with wood protection?

Follow these steps for best results:

1. Clean the surface thoroughly to remove dirt, mold and loose fibers. Use wood cleaner or high-pressure water with caution.
2. Allow the wood to dry completely — moisture content should be low for optimal penetration.
3. Stir the product well. Apply according to instructions (brush, roller or spray depending on the product).
4. Allow to dry according to the specified times. One or two coats may be recommended depending on the product and the absorbency of the wood.
5. Maintenance: check the surface annually and touch up as necessary to maintain water repellency and protection against fouling.

Where can I buy wood preservative?

Wood preservatives are available at local hardware stores and large chains. In Canada and the US, users often look for products at retailers like Home Depot or Home Hardware; in Europe, they are available at hardware stores and paint retailers. Also look for specialty online stores and local retailers that focus on environmentally friendly building products.

Tips when buying:

• Check the product's intended use (outdoor/indoor/ground contact).
• Search for eco-labels and technical data sheets for safety and drying information.
• Compare coverage and recommended number of coats to figure out how much you need.

Why choose a silicon-based wood protector?

Silicon-based wood preservatives offer several benefits: they are water-resistant, dirt-repellent and reduce the risk of fouling. Many silicon products are based on natural ingredients and are more environmentally friendly than traditional chemical preservatives. They can also change the surface of the wood to a beautiful silver-gray tone after a few months in the sun.

If you want to try a modern, eco-friendly solution that provides long-lasting water-repellent protection and a natural grayed appearance, consider it as an outdoor option.

Quick tips for best results

• Work in dry conditions and avoid rain during the drying period.
• Follow the temperature and humidity recommendations in the product sheet.
• Always do a small test on a sample piece to see aesthetic change and drying time.
• Start with cleaning and possibly light sanding for maximum adhesion.

Summary

Silicon-based wood preservatives are an excellent choice for outdoor surfaces where you want water repellency, reduced fouling and a natural, environmentally friendly product. Use the right product for the right application (especially in ground contact), follow the instructions carefully and maintain the surface regularly for long-lasting protection.