10 Best Floor Gap Filler in The UK

Last updated on 25/07/2025

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Best Choice

9.8

Exceptional

DraughtEx

DraughtEx (Standard) Floorboard Gap Filler for Home Insulation, Filling Gaps in Floorboards

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Why We Love It

Cuts energy bills significantly.
Simple, adhesive-free application.
Flexible, multi-size fitting.

Main Highlights

Proven floorboard gap filler designed to reduce cold draughts and save money.
Potential savings up to 40 GBP per room per year on energy bills and reduce CO2 contribution by around 110kg.
Standard, 8mm (on a 40m roll) to fill gaps of 3 - 7mm.
Also available in additional sizes to fill all gaps: thin for gaps less than 3mm, thick for gaps 10 to 12mm.
Flexible properties allow for easy fitting into floorboard gaps, requires no adhesive or specialist skill. Easy-to-use applicator included.

Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2 + Applicator Tool

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Why We Love It

Advanced flexible for effective sealing.
Perfect for draught proofing gaps.
Includes applicator tool for convenience.

Main Highlights

Bond it lami mate Laminates and Timber wood sealant
Advanced Flexible Sealant And Gap-Filler For Timber And Laminates
Ideal for draught proofing around timber flooring to provide an effective dust and air tight seal.
Laminate floor sealant, floorboard gap filler, wood sealant
2 x Pine Colour Tubes + Applicator Tool

Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2

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Why We Love It

Advanced flexible gap-filler.
Effective dust-tight sealant.
Ideal for timber flooring.

Main Highlights

Bond it lami mate Laminates and Timber wood sealant
Advanced Flexible Sealant And Gap-Filler For Timber And Laminates
Ideal for draught proofing around timber flooring to provide an effective dust and air tight seal.
Laminate floor sealant, floorboard gap filler, wood sealant

Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (White)

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Why We Love It

Flexible and durable sealant.
Effective for various materials.
Economical coverage for projects.

Main Highlights

OSMO UK - GAP SEALER is a single component acrylic sealant
Should NOT be used for sealing joints permanently exposed to water
Resistant to air conditions, stay elastic a long time after curing
Uses: Joints in stone, wood, concerete, plaster, brick works, PVC, iron, aliminium
Based on 3mm gaps a 310ml tube will fill in excess of 30 linear metres

Wudcare WCFBGF1000 Floorboard Gap and Joint Filler 1 L Quick Drying, Clear, 1L

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Why We Love It

Flexible and non-yellowing acrylic.
Quick drying and water-washable.
Matches wood’s color perfectly.

Main Highlights

Based on a flexible water-borne, non-yellowing acrylic resin
Use in combination with saw or sanding dust from carpentry work as a colour-matched filler for gaps
Non-yellowing, low odour, quick drying, water-washable
Fills the gap and doesn't shrink, matches the colour of the wood
1 litre made in the UK

DraughtEx (Thin) Floorboard gap filler for home insulation, filling gaps in floorboards

Lami Mate Flexible Sealant | Floorboard Gap Filler | Dark Oak | Bond it | Pack of 2

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Why We Love It

Flexible and effective sealant.
Ideal for draught proofing.
Perfect for timber and laminates.

Main Highlights

2 x Dark Oak Colour
Bond it lami mate Laminates and Timber wood sealant
Advanced Flexible Sealant And Gap-Filler For Timber And Laminates
Laminate floor sealant, floorboard gap filler, wood sealant
Ideal for draught proofing around timber flooring to provide an effective dust and air tight seal.

Everbuild Deep Gap Filler – Ready Mixed – Easy To Use – Non-Shrink – Quick Drying – Overpaintable – Light Grey – 1 Litre

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Why We Love It

Revolutionary formula fills large gaps.
Quick drying for convenience.
No sanding needed pre-painting.

Main Highlights

REVOLUTIONARY FORMULA – Innovative ceramic spheres work to fill gaps up to 50mm deep in plaster, brick, wood, masonry and more instantly, with one application.
READY TO USE – Use it straight from the tub onto your substrate for an easy, simple gap filler.
NO SHRINKAGE MIXTURE – The lightweight ceramic spheres do not shrink in differing temperatures, so there's no chance of shrinking, cracking or sagging.
QUICK DRYING – Cures for decorating in as little as 30 minutes if the conditions are ideal.
NO NEED TO SAND – The paste formula sets to a naturally smooth finish no matter where you apply, so there's no need to sand before painting.

Bond It Lami-Mate Timber & Laminate Sealant Wood Floor Gap Joint Filler EU3 Laminates Flooring Windows Parquet Silicone 310ml (Light Oak, 310ml)

Why We Love It

Permanently flexible for various applications.
Effective dust and air sealant.
Ideal for sealing furniture fittings.

Main Highlights

Bond It LAMI-MATE stays permanently flexible and can be used for sealing all types of laminate and hardwood flooring.
An polymer enhanced, flexible sealant and gap‐filler designed for sealing all tongue and groove laminate flooring.
It is ideal for draught proofing around timber flooring to provide an effective dust and air tight seal.
It can also be used for sealing around timber window and door frames as well as all types of fitted furniture i.e. bedroom and kitchen fittings, laminate worktops, etc.
LAMI-MATE is also suitable for sealing glass panels into kitchen unit doors.

Ronseal 6886271-HHW Smooth Finish Filler Multi-Purpose Ready Mixed 900g, White

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Why We Love It

Supplied in re-sealable plastic tub.
Produces extremely smooth finish.
Ideal for various repairs.

Main Highlights

The Ronseal RSLMPRMF6VP is supplied in a Plastic tub with re-sealable lid.
Ronseal multi-purpose produces an extremely smooth finish and has excellent application properties coupled with strength and flexibility
Ideal for making repairs to plaster, stone, concrete or wood
Model number: 6886271-HHW

8.7

Excellent

We scanned 703 products

We reviewed these offers relevant to the Floor Gap Filler within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like DraughtEx, ABL Supplies, Osmo, WUDCARE, Everbuild, ARA CHOICE, Ronseal, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Floor Gap Filler in the market, we considered we took a deep dive into 3516 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is DraughtEx (Standard) Floorboard Gap Filler for Home Insulation, Filling Gaps in Floorboards. We love many things about this product by DraughtEx. What sets it apart from the competition is Cuts energy bills significantly, Simple, adhesive-free application. , Flexible, multi-size fitting.
The best value product for most shoppers and where user satisfaction is continuously the highest is Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2 + Applicator Tool by ABL Supplies based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Floor Gap Filler and the best cost-to-value ratio is Everbuild Deep Gap Filler – Ready Mixed – Easy To Use – Non-Shrink – Quick Drying – Overpaintable – Light Grey – 1 Litreat Everbuild with a 14% discount.
Our list of the best Floor Gap Filler is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Floor Gap Filler in The UK

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We scanned 703 products

We concluded that: