Osmo Interior Gap Sealer



This high quality single component acrylic sealant is ideal for filling joints on wood flooring, skirting, door thresholds etc as well as repairing splits and gaps. Can be over painted or treated with Osmo Polyx oils.

Choose your product

Please use the drop down menus to view all the colour & size options available
*All Colours are a representation and may differ from the actual colour once applied.
Order QTY Price per item You will save an additional
4 or more £6.57 £0.73 per item
6 or more £6.20 £1.10 per item


£7.30 Inc VAT

£6.08 Excl VAT

100% secure payments






The Osmo Interior Gap Sealer is a high quality single component acrylic sealant that can be used for filling, fixing and repairing all manner of splits and gaps as well as sealing and filling joints on finished and unfished wood flooring, skirting, door thresholds, sealing windows and door frames to masonry. It can also be used for assembling wood, PVC, iron and aluminium joinery as well as sealing joints in wood, stone, concrete, plaster and brick.

Nb. From our experience light oak is the best match for new untreated oak but as with all natural products colours can vary and if you are unsure we recommend buying a single tube to test the colour match.

Key information:

  • Application temperature between +5°C to 40°C.
  • Drying time: 1hr.
  • Volume: 310ml.
  • Should not be used for sealing joints permanently exposed to water

Key benefits:

  • Very easy application.
  • Can be treated with Osmo finishes after drying.
  • Applies pink dries white.
  • Forms permanent water resistant layer after curing
  • Resistant to air conditions, stays elastic a long time after curing.
  • Paintable, contains no oils and does not affect the surface applied to. 

Available Colours:

  • White (RAL 9010)
  • Pine/Spruce (RAL 1001)
  • Light Oak (RAL 1002)
  • Medium Oak (RAL 8001)
  • Dark Oak (RAL 8024)
  • Red Wood (RAL 8012)
  • Walnut (RAL 8007)
  • Grey (RAL 7035)
  • Black (RAL 8022)

Typical applications for Osmo Gap Sealer:

  • Expanding gap between Prefabricated elements
  • Wood, PVC, Iron or aluminium joinery
  • Joints in stone, wood, concrete, plaster & brick
  • Sealing of window and door frames to masonry

* Please note that the colours displayed are only a guide as the appearance will vary on different screens and printers.

Area of Use - Interior only.

There are currently no FAQs, please check back later.