10 Best Floor Gap Filler in The UK

Last updated on 04/07/2025
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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
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
9.6
Superb
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3
9.4
Superb
Draughtex Floorboard & Skirting Board Insulation, Floor Gap Filler Draught Excluder - Thick 6-11mm 10m roll
DraughtEx
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.
9.4
Superb
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4
9.2
Superb
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
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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.
9.2
Superb
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5
9.1
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
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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
9.1
Superb
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6
9.1
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
9.1
Superb
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7
9.1
Superb
Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (White)
Osmo
Osmo Gap Sealer 310ml - Flexible Sealant for Wood Floors (White)
Free Shipping
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
9.1
Superb
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8
9.0
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.
9.0
Superb
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9
8.8
Excellent
Save 13%
Everbuild EVBTIMBOAK Timber and Laminate Sealant Oak C3, Set of 6
Everbuild
Everbuild EVBTIMBOAK Timber and Laminate Sealant Oak C3, Set of 6
13% Off
Why We Love It
  • Permanently flexible, never cracks.
  • Antimould formulation protects surfaces.
  • Multiple colors for easy match.
Main Highlights
  • WORKABLE – This product is a permanently flexible polymer-rich sealant and gap filler.
  • VERSATILE – Designed for sealing around laminate flooring, fitted furniture and kitchen worktops.
  • ANTI-MOULD FORMULATION – Contains a fungicide to protect against mould growth in the sealant.
  • LOW MAINTENANCE – Leaves a matt finish which will not pick up dirt and is easy to clean. Can be painted, varnished or stained once cured.
  • MULTIPLE COLOURS – The versatile four-colour range offers a near or exact match to many popular laminate floors and melamine board finishes. It's available in Beech, Mahogany, Oak and Pine.
  • Timber And Laminate Sealant
  • Brand: Everbuild
8.8
Excellent
Save 13%
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10
8.7
Excellent
Save 26%
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)
26% Off
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.
8.7
Excellent
Save 26%
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