Cuprinol Ultra Tough Wood Filler - White

The filler is workable for up to 10 minutes after mixing the filler and catalyst paste.

Under normal conditions, the filler dries hard in approximately 30 minutes.

Yes, this is a high-performance, weather-resistant wood filler suitable for both indoor and outdoor use.

Yes, once dry, the filler can be screwed, drilled, sanded, filled, and painted or stained.

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

The recommended ratio is a golf ball size of filler to a 40mm (1.5 inch) thread of catalyst paste from the tube.

No, the formula is designed to resist shrinking, splitting, and cracking, providing a long-lasting repair.

Yes, it can fill holes of any size or depth. For holes deeper than 25mm (1 inch), it is recommended to fix screws into the bottom of the hole to improve filler anchorage.

You may have used too much catalyst. Ensure you follow the recommended ratio strictly. Mix only the amount that can be used within the 10-minute working time.

Ensure the correct ratio of filler to catalyst was used. Check that the components were mixed thoroughly until a uniform color was achieved. Make sure the ambient temperature is suitable for curing.

Ensure the wood substrate is sound and dry. Deep holes may require filling in layers or using screws for anchorage. Avoid applying too thick a layer in one go for very large repairs.

Allow the filler to cure fully for at least 30 minutes (longer in cold conditions). A slight tackiness may occur but should not prevent smoothing; ensure tools are clean. If still problematic, check mixing ratios and curing conditions.

Ensure the filler is fully dry and sanded smooth. Surface preparation of the surrounding wood is also critical. Test your chosen paint or stain on a small, inconspicuous area first.