Cuprinol Ultra Tough Wood Filler - Exterior Woodcare - White - 250g

A fast setting, high performance wood filler for the filling of a hole any size or depth. This woo...

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BradfordsCuprinol Ultra Tough Wood Filler 250g White for Indoor and Outdoor Repairs
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£17.44
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OnBuy.comCuprinol 5092527 Ultra Tough Wood Filler Exterior Woodcare, White 250G
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Product Information

Full details

The Cuprinol Ultra Tough Wood Filler in White is a high-performance solution for repairing any size or depth of hole in wood, ideal for both interior and exterior projects. Its key benefit is its fast-setting, durable, and weather-resistant formula that can be painted or varnished once dry. A caveat to note is the 10-minute workable time, requiring efficient mixing and application.

All features

ColourWhite
Model Part Number5092527
BrandCuprinol

Extended Product Information

FAQs

How long does Cuprinol Ultra Tough Wood Filler take to dry?

The filler is workable for up to 10 minutes and dries hard within approximately 30 minutes under normal conditions.

Can this wood filler be used for both indoor and outdoor repairs?

Yes, it is suitable for both interior and exterior use, offering durable and weather-resistant repairs.

What is the workable time for the mixed filler?

You have approximately 10 minutes to mix and apply the filler once the catalyst has been added.

Can I screw or drill into the filler after it has hardened?

Yes, once dry, the filler can be screwed, drilled, sanded, and filed, behaving much like natural wood.

What is the best way to clean tools after using the filler?

Remove as much product as possible from the application equipment before cleaning with brush cleaner.

How do I ensure the best paint or stain finish over the filler?

Prepare the surface well and test your chosen paint or woodstain on a small area first to ensure satisfaction before applying to the entire repair.

What causes the filler to become very hot or dry too quickly?

This is typically caused by adding too much catalyst paste during mixing. Adhere strictly to the recommended proportions for optimal performance and safety.

Troubleshooting

Filler dries too quickly or becomes very hot.

This is likely due to using too much catalyst. Ensure you follow the recommended mixing proportions precisely. Only mix an amount that can be used within 10 minutes.

Filler does not adhere well to the wood.

Ensure the surface was properly prepared. Remove all paint, varnish, dirt, loose material, and decayed wood. The surface must be sound and dry.

Filler remains slightly tacky after drying.

A slight tackiness can occur but should not affect smoothing, painting, or staining. Ensure it has set hard (approx. 30 minutes) before attempting to sand.

Surface finish (paint or stain) shows through unevenly.

This can be influenced by wood preparation and the type of stain. Always test the finish in an inconspicuous area first to ensure satisfactory results before applying to the entire repair.

Difficulty in sanding the filler.

Ensure the filler has fully hardened before sanding. Use appropriate grit sandpaper for smoothing.

Pros and Cons

Pros

  • Provides long-lasting, weather-resistant repairs.
  • Can be easily worked after drying (sanded, drilled, screwed, nailed).
  • Resists common issues like shrinking, splitting, and cracking.
  • Suitable for filling holes of any size or depth under normal conditions.
  • Can be painted or varnished to match existing finishes.

Cons

  • Limited workable time of 10 minutes requires quick application.
  • Requires thorough surface preparation for optimal adhesion.
  • VOC content is medium (8-24.99%), requiring adequate ventilation during use.
  • Dries to a smooth finish, but test areas are recommended before applying woodstains for satisfaction.
  • Catalyst mixing must be precise to avoid overheating and premature drying.

Setup, Compatibility & Care

Preparation is key: Before application, thoroughly remove all decayed wood, paint, varnish, dirt, and loose material from the repair area, extending 1-2 inches around it. For deep holes (over 1 inch), consider inserting screws with heads and stems exposed for better filler anchorage. If the wood is wet, allow it to dry completely. For best results, pre-treat the repair area with an appropriate Cuprinol wood preserver and let it dry.

Mixing: Mix only the amount of filler you can use within 10 minutes. On a hard surface, combine a golf ball-sized amount of filler with a 1.5-inch thread of catalyst paste. Mix thoroughly until uniform in colour and no streaks remain. Be cautious: too much catalyst can cause the filler to become very hot and dry too quickly.

Application: Apply a thin first coat, pressing firmly for good adhesion. Fill the remainder of the hole slightly proud. Allow to set hard (approx. 30 minutes).

Finishing: Once set, smooth the filler using sandpaper or a file. The repair is ready to be painted or stained. Test your chosen finish on a small area first to ensure satisfaction.

Tool Cleaning: Remove as much product as possible from application tools before cleaning with brush cleaner.

Compatibility: The filler accepts paints and woodstains, including Cuprinol and Dulux Trade Woodstains. Ensure compatibility with specific finishes by testing first.

Care: Store the filler in a cool, dry place, away from direct sunlight and extreme temperatures.

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