10 Best Gap Filler For Floorboards in The UK

Last updated on 25/06/2025

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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.

DraughtEx - 4mm Width (40m Roll)

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Why We Love It

Reduces cold draughts effectively.
Saves on energy bills.
Helps lower CO2 contributions.

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.
Thin, 4mm (on a 40m roll) to fill gaps of less than 3mm.
Also available in additional sizes to fill all gaps: standard for gaps 3 to 7mm, 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.

Draughtex Floorboard & Skirting Board Insulation, Floor Gap Filler Draught Excluder - Thick 6-11mm 10m roll

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Why We Love It

Reduces cold draughts effectively.
Saves up to 40 GBP yearly.
Easy installation, no special skills.

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.
Thick, 12mm (on a 10m roll) to fill gaps of 6 - 12mm.
Also available in additional sizes to fill all gaps: thin for gaps less than 3mm, standard for gaps 3 to 7mm.
Flexible properties allow for easy fitting into floorboard gaps, requires no adhesive or specialist skill. Easy-to-use applicator included.

StopGap Floorboard Draught Excluder - Brown

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Why We Love It

Stops cold air immediately.
Effortless installation process.
Highly efficient insulation solution.

Main Highlights

Stop Floorboard Draughts
Superbly Simple
Extremely Effective
No fuss, No Mess
The best way to insulate your floorboards

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

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.

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

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

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

Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Pine/Spruce)

3% Off

Why We Love It

Flexible and durable sealant.
Wide range of applications.
Great coverage for gaps.

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

8.7

Excellent

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We scanned 703 products

We reviewed these offers relevant to the Gap Filler For Floorboards 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, StopGap, ABL Supplies, WUDCARE, Osmo, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Gap Filler For Floorboards 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 DraughtEx - 4mm Width (40m Roll) by DraughtEx based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Gap Filler For Floorboards and the best cost-to-value ratio is Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (Pine/Spruce)at Osmo with a 3% discount.
Our list of the best Gap Filler For Floorboards 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 Gap Filler For Floorboards in The UK

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We scanned 703 products

We concluded that: