Name: Bona Gap Master Flexible Wood Floor Gap Filler 310ml
Brand: Bona
SKU: AF4411311103
Price: 16.83 GBP
Availability: InStock

Bona Gap Master Flexible Wood Floor Gap Filler is a silicon-free, acrylic-based sealant designed for sealing perimeter gaps around skirting boards, thresholds and expansion joints in wood flooring.

Supplied in a convenient 310ml cartridge, Bona Gap Master remains permanently flexible, helping accommodate the natural movement of timber floors. Once fully dry, it can be overcoated with Bona lacquers and is available in a range of colours to complement most wood flooring.

Why Choose Bona Gap Master?

Flexible acrylic wood floor gap filler
Silicon-free formulation
Permanently elastic (up to 15% movement)
Can be overcoated with Bona lacquers
Low odour and solvent free
Ideal for skirting boards and thresholds
Suitable for repairing small gaps and cracks in wood floors
Available in 15 colours

Typical Applications

Expansion gaps around skirting boards
Thresholds and doorways
Perimeter movement joints
Small gaps between timber and adjacent surfaces
Minor cracks in wooden floors
Finishing solid and engineered wood flooring installations

Professional Tip:
Bona Gap Master is ideal for perimeter movement gaps that require a neat, flexible finish. It is not intended to replace expansion joints but to provide a clean, professional appearance while allowing normal seasonal movement.

Technical Information

Product type	Flexible acrylic wood floor sealant
Pack size	310ml cartridge
Movement capability	Up to 15%
Application	Standard cartridge sealant gun
Suitable for	Solid and engineered wood flooring
Finish	Can be overcoated with Bona lacquers once dry
Colours	15 colour options available

Preparation

Ensure all joints are clean, dry and free from dust.
Remove any loose material before application.
Select the closest colour match for the flooring.
Mask adjacent surfaces if required for a cleaner finish.

Application

Load the cartridge into a standard sealant gun.
Cut the nozzle to the required bead size.
Apply a continuous bead into the joint.
Smooth the sealant immediately using a suitable finishing tool.
Remove masking tape before the product skins over.
Allow to dry fully before applying Bona lacquer where required.

Recommended Products

Bona cartridge application gun
Bona Traffic HD lacquers
Bona Prime Classic and Bona Prime Intense primers
Masking tape for clean application

Important: Bona Gap Master is designed for sealing perimeter and movement gaps around wood flooring. Always maintain the expansion gap recommended by the flooring manufacturer and do not fill structural movement joints completely rigid.

1. What is Bona Gap Master used for?

Bona Gap Master is a silicone-free, flexible mastic designed for filling gaps between wooden floors and skirting boards, as well as between floorboards. It provides a long-lasting, flexible seal that can move with the natural expansion and contraction of wood.

2. How do I apply Bona Gap Master?

Bona Gap Master can be applied using a standard caulking gun. Cut the nozzle to the desired width and apply the mastic into the gap. Smooth the surface with a damp finger or tool to create a neat finish. Ensure the area is clean, dry, and free from dust before applying.

3. How long does Bona Gap Master take to dry?

Bona Gap Master typically skins over in about 10-15 minutes and fully cures within 24 hours, depending on the size of the gap and environmental conditions such as temperature and humidity.

4. Can Bona Gap Master be sanded or painted?

Yes, once fully cured, Bona Gap Master can be sanded and painted over to match the surrounding wood or wall. This makes it ideal for seamless repairs where the filler needs to blend with the existing décor.

5. Is Bona Gap Master suitable for use on all types of wooden floors?

Yes, Bona Gap Master is suitable for use on all types of wooden floors, including solid wood, engineered wood, and parquet. It is also effective for sealing gaps between floorboards, as well as between the floor and skirting boards.

6. Is Bona Gap Master environmentally friendly?

Yes, Bona Gap Master is a silicone-free, water-based product, making it environmentally friendly and safe for indoor use. It contains low levels of VOCs (volatile organic compounds), contributing to better indoor air quality.

7. Can Bona Gap Master be used for large gaps?

Bona Gap Master is ideal for filling smaller to medium-sized gaps up to 5mm wide. For larger gaps, alternative methods, such as using wood slivers or expanding foam, may be more suitable depending on the size and nature of the gap.

8. How do I clean up after using Bona Gap Master?

Clean tools and any excess mastic immediately with water while it is still wet. Once the product has dried, it will need to be removed mechanically.

Payment methods

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Area	Excluded postcodes
North-east Scotland	AB31–AB45, AB51–AB56
Central & northern Highlands	FK19–FK21; all IV
Outer Hebrides	All HS
Arran & Cumbrae	KA27–KA28
Caithness, east Sutherland & Orkney	All KW
Argyll & Inner Hebrides	PA21–PA38, PA41–PA49, PA60–PA78
Perthshire & western Highlands	PH1 1, PH1 3, PH1 4, PH5–PH10, PH15–PH26, PH30–PH44, PH49–PH50
Shetland	All ZE
Northern Ireland	All BT
Channel Islands & Isle of Man	All GY, JE & IM
Isles of Scilly	TR21–TR25

Bona Gap Master Flexible Wood Floor Gap Filler 310ml