Ronseal High Performance Wood Filler White

Ronseal High Performance Wood Filler White is a tough, two-part wood filler for serious repairs on interior and exterior wood. It’s designed to fill holes to any depth and dries in around 30 minutes, helping you move faster from repair to finish.

Once cured, it forms a durable repair that won’t shrink or crack, making it ideal for trade touch-ups and DIY fixes on doors, frames, skirting and more.

Key benefits

• Fast curing: dries in around 30 minutes
• Fills to any depth for deep holes and major repairs
• Suitable for interior and exterior wood
• Tough repair that won’t shrink or crack
• Great for rebuilding damaged or rotten areas of timber
• Can be drilled, screwed or planed once dry
• White colour for clean repairs under paint finishes

Best for

• Trade: fast turnaround repairs on doors, frames, trims and exterior joinery
• DIY: filling deep holes/cracks before painting, restoring worn timber, patch repairs
• Rebuilding damaged wood and filling holes where a stronger repair is needed

Key features / Why it matters

• Two-part system for a stronger repair on demanding jobs
• Durable finish that flexes with the wood to help prevent cracking/shrinkage
• Interior & exterior use for a consistent filler across multiple jobs

Variants

Choose your size: 275g for smaller repairs and punch-list jobs, 550g for regular use, or 1kg for bigger repairs and repeat projects.

Specifications

What’s included

• Ronseal High Performance Wood Filler White (selected size)

How to use / Application guide

1. Ensure the wood is clean, dry and sound. Remove loose or rotten material until you reach a firm base.
2. Mix the two parts as directed (only mix what you can use within the working time).
3. Press firmly into the repair and shape using a flat scraper.
4. Allow to dry (approx. 30 minutes) before sanding/finishing.
5. Once cured, you can drill, screw or plane the repair if needed, then finish with your chosen coating.

Accessories & add-ons

• Rollers & sleeves (trade 9" / 12"), roller frame and extension pole
• Brushes
• Paint scuttle/tray and liners
• Masking tape, dust sheets, protective film
• Abrasives/sanding pads for surface prep
• PPE: gloves, eye protection, and respiratory protection for spraying

Delivery & returns

• Free shipping over £50 (UK)
• 28 day returns

Why buy from us

• UK stock
• Fast dispatch
• Trade-friendly service
• Support from a knowledgeable team
• Independent, family owned business
• 16 decorating stores nationwide

FAQs

What is Ronseal High Performance Wood Filler White used for?

It’s a two-part high performance wood filler for repairing interior and exterior wood, including deep holes and damaged areas where you need a tough repair.

How long does it take to dry?

Ronseal lists a dry time of around 30 minutes. Drying can vary with conditions and the size of the repair.

Can I use it outdoors?

Yes. It’s suitable for use on interior and exterior wood.

Can it fill deep holes?

Yes. Ronseal states it can fill holes to any depth, making it suitable for major repairs.

Will it shrink or crack?

Ronseal states the formula flexes with the wood to help prevent shrinkage and cracking once cured.

Can I drill or screw into it?

Yes—once dry, Ronseal confirms their wood fillers can be drilled or screwed (and planed) as needed.

Which size should I choose: 275g, 550g or 1kg?

275g suits small repairs and snagging; 550g is ideal for regular DIY/trade jobs; 1kg is best for larger repairs or frequent use.

How do I apply it?

Ronseal recommends applying with a flat scraper after mixing the two parts. Prep the wood so it’s clean and sound, fill and shape, then sand and finish once cured.

Can I sand it smooth before painting?

Yes—once cured, sand the repair flush to the surface before applying your chosen finish.

Is this the same as a ready-mixed wood filler?

No—this is a two-part system designed for tougher repairs and deeper fills than many standard ready-mixed fillers.

Order by 2PM to get delivered next working day! We use 24 hours service with carriers in most cases so that you can get your order delivered on time.

There is £7.50 charge for delivery under £50 Orders. Additional charges will be imposed by our couriers for delivery to remote area, a surcharge may be levied to cover carriage to these areas.