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Seal It Right: The Ultimate Guide to Sealing Outdoor Furniture and Decking 

Introduction


Outdoor Furniture

Did you know that one small overlooked detail can ruin your outdoor furniture or decking? It all comes down to sealing every surface, especially those hidden spots like the end grain and the undersides of furniture legs. Without proper sealing, water can sneak in, causing peeling, rot, and expensive repairs. Here’s how to paint and seal outdoor furniture and decking correctly the first time.

 

Outdoor Furniture: Sealing Every Inch

Outdoor furniture is constantly exposed to rain, humidity, and fluctuating temperatures, so ensuring it’s completely sealed is critical.

End  Grain Wood


Focus on End Grain

The end grain of wood—where the wood is cut—is the most absorbent part and a major weak spot for water entry. Even if the main surfaces are sealed, untreated end grain can absorb water, causing swelling and peeling. Ensure you seal the end grain thoroughly with the recommended number of coats.



 Don’t Forget the Underside

The underside of legs is another often-missed area. When these sit in water, capillary action allows moisture to creep up, leading to peeling sealer and exposing bare wood to damage.

 

Top Tip: After sealing, attach plastic furniture feet nails to the bottom of the legs. This raises the furniture slightly off the ground, preventing the legs from sitting in water when it rains.

 

Choose the Right Sealer: Use Harlequin Exterior Sealer for maximum protection. Available in gloss and matte finishes, it’s designed to shield against water, UV rays, and wear.

 

Wooden Decking

Decking: Pre-Treatment Is Key

Decking is another area where preparation is everything. Neglecting the sides, underside, or end grain of wooden slats can lead to rot over time, especially when water stagnates.

 

Seal All Sides Before Installation

Before installing decking boards, make sure all surfaces—top, sides, underside, and especially the end grain—are sealed. Once the boards are installed, the underside and edges are usually inaccessible, leaving them vulnerable to water damage.

 

Recoat After Cutting to Fit

Even if you pre-treat the planks, any cuts made during installation expose fresh wood. These areas must be re-sealed with the recommended number of coats to maintain full protection.

 

Prevent Rot with Harlequin Exterior Sealer

Designed specifically for outdoor use, Harlequin’s low-VOC formula penetrates the wood, providing a weather-resistant barrier. Its durability ensures your decking stays protected even in harsh conditions.

Harlequin Exterior Sealer Varnish outdoor

Why Harlequin Exterior Sealer?


Gloss and Matt Options: Choose your preferred finish for furniture and decking.


Eco-Friendly: Low-VOC and safe for your family and the environment.

Long-Lasting Protection: Shields wood against moisture, UV damage, and wear.


Key Takeaways: Always seal every surface of outdoor furniture and decking, including hidden spots like the end grain and undersides. Recoat any freshly cut wood to ensure consistent protection.

Use Harlequin Exterior Sealer for a durable, eco-friendly solution.

 

By taking the time to seal your wood thoroughly, you’ll protect your outdoor spaces from peeling, swelling, and rot, ensuring they last for years.

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