Ronseal High Performance Wet Rot Wood Hardener 250ml
£7.04 exc. VAT
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About Ronseal
Ronseal is a trusted name in woodcare and paint, known for its no-nonsense products that “do exactly what they say on the tin.” Whether you’re protecting decking, restoring fences, or enhancing interior woodwork, Ronseal offers a wide range of solutions designed for lasting performance and ease of use. Their formulas are built to resist the elements, withstand daily wear, and deliver consistently reliable results across all types of timber surfaces.
From their long-lasting Fence Life Plus and 10 Year Weatherproof Wood Paint to durable interior varnishes and specialist wood treatments, Ronseal makes woodcare simple and effective. With options for staining, painting, preserving, and waterproofing, there’s a Ronseal product for every project inside or out.
Product Description
Stop wet rot spreading and make your wood hard again so it can be easily repaired. Suitable for doors, windows and frames. Can be used inside or outside.
- Repairs rotten wood.
- Dries in two hours.
- Sets rock hard.
- Soaks in deep and strengthens rotten wood.
- Provides a strong base to begin filling cracks and holes.
- For interior and external wood.
Before you Start
Wear protective gloves to avoid getting hardener on your skin. Open your doors and windows for added ventilation.
- Remove loose or crumbling wood and make sure the area is dry.
- For the best repairs, drill small holes into the wood so hardener can get in deeper.
Application
- Give the tin a thorough shake.
- Pour some of the hardener out into the plastic lid.
- Apply it with a paint brush. Make sure you get enough on so that it completely soaks into the rotten wood.
- Leave it to dry for two hours.
- Scrub with a wire brush to get rid of any excess hardener.
Aftercare
Once you’ve used the hardener, you can focus on repairing the wood and filling any holes or cracks with Ronseal wood filler.
Cleaning:
Clean your tools with white spirit.













