Timber brings warmth and character to any home, but over time it can suffer from rot, cracks, or insect damage. Many homeowners assume replacement is the only option, but with the right products and approach, you can restore timber yourself and achieve professional-quality results. The secret? Using a high-performance wood repair epoxy like Sellaseal DT.
Why Choose Epoxy for Timber Repair?
Unlike standard wood fillers, epoxy bonds deep into the timber and cures into a hard, durable surface that resists weather, moisture, and movement. This makes it ideal for repairing window frames, doors, sills, and other structural or exterior timber elements where strength and longevity matter.
Tools and Materials You’ll Need
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Mixing board and scraper
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Sandpaper (medium and fine grit)
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Protective gloves
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Paint or stain for finishing
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Optional: small saw or chisel for removing rotten wood
Step 1: Prepare the Timber
Remove as much of the rotten or damaged wood as possible with a chisel, scraper, or saw. Make sure the area is clean and dry before applying epoxy hardener—this ensures maximum adhesion and prevents further decay.
Step 2: Mix the Epoxy
Follow the instructions to combine the two parts of Sellaseal DT Epoxy. Mix thoroughly on a board until the colour and texture are consistent. Proper mixing is crucial for a strong cure.
Step 3: Apply the Epoxy
Press the mixed epoxy firmly into the repair area using a scraper or putty knife. For deeper repairs, build it up in layers, ensuring each application is well compacted against the timber. Shape it roughly to match the original profile of the wood.
Step 4: Allow to Cure
Curing times depend on the size of the repair—smaller applications may be ready in an hour, while larger sections can take up to four. Avoid disturbing the repair until it has fully hardened.
Step 5: Sand and Finish
Once cured, sand the epoxy smooth with medium then fine-grit paper. The surface can now be painted or stained just like timber. A well-prepped epoxy repair blends seamlessly with the surrounding woodwork.
Tips for a Professional Finish
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Drill pilot holes if you plan to screw or nail into the epoxy.
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Don’t rush the curing process—patience ensures strength.
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Use paint or sealant after repair to protect the timber from future moisture.
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Watch our how-to videos for step-by-step visual guidance.
The Takeaway
Timber doesn’t need to be replaced every time it shows signs of damage. With Sellaseal DT Epoxy, DIY timber repair is simple, affordable, and long-lasting. By following the right steps, you can achieve a professional-quality finish that keeps your timber strong and beautiful for decades.