10 Best Floor Gap Filler in The UK

Last updated on 25/07/2025
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Best Choice
1
9.8
Exceptional
DraughtEx (Standard) Floorboard Gap Filler for Home Insulation, Filling Gaps in Floorboards
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.
9.8
Exceptional
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Best Value
2
9.6
Superb
Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2 + Applicator Tool
ABL Supplies
Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2 + Applicator Tool
Free Shipping
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
9.6
Superb
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3
9.4
Superb
Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2
ABL Supplies
Lami Mate Flexible Sealant | Floorboard Gap Filler | Pine | Bond it | Pack of 2
Free Shipping
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
9.4
Superb
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4
9.2
Superb
Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (White)
Osmo
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
9.2
Superb
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5
9.1
Superb
Wudcare WCFBGF1000 Floorboard Gap and Joint Filler 1 L Quick Drying, Clear, 1L
WUDCARE
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
9.1
Superb
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6
9.1
Superb
DraughtEx (Thin) Floorboard gap filler for home insulation, filling gaps in floorboards
DraughtEx
DraughtEx (Thin) Floorboard gap filler for home insulation, filling gaps in floorboards
Free Shipping
9.1
Superb
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7
9.1
Superb
Lami Mate Flexible Sealant | Floorboard Gap Filler | Dark Oak | Bond it | Pack of 2
ABL Supplies
Lami Mate Flexible Sealant | Floorboard Gap Filler | Dark Oak | Bond it | Pack of 2
Free Shipping
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.
9.1
Superb
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8
9.0
Superb
Save 14%
Everbuild Deep Gap Filler – Ready Mixed – Easy To Use – Non-Shrink – Quick Drying – Overpaintable – Light Grey – 1 Litre
Everbuild
Everbuild Deep Gap Filler – Ready Mixed – Easy To Use – Non-Shrink – Quick Drying – Overpaintable – Light Grey – 1 Litre
14% OffFree Shipping
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.
9.0
Superb
Save 14%
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9
8.8
Excellent
Bond It Lami-Mate Timber & Laminate Sealant Wood Floor Gap Joint Filler EU3 Laminates Flooring Windows Parquet Silicone 310ml (Light Oak, 310ml)
ARA CHOICE
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.
8.8
Excellent
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10
8.7
Excellent
Ronseal 6886271-HHW Smooth Finish Filler Multi-Purpose Ready Mixed 900g, White
Ronseal
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
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