Osmo Gap Sealer - 310ml Tube

SKU: GS8007
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - White
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Black
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Dark Oak
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Medium Oak
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Light Oak
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Walnut
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Pine / Spruce
Osmo Gap Sealer - Flexible Sealant - 310ml Tube - Grey

Osmo Gap Sealer - 310ml Tube

SKU: GS8007
Regular price £7.95
Tax included.

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Osmo Gap Sealer is an acrylic sealer ideal for sealing and filling joints on interior wood, PVC, iron and aluminium joinery. The perfect sealer for your joinery products as it can be sanded after curing and treated with Osmo finishes after only 1 hour. Formulated to be resistant to air conditions and stay elastic to stop cracking or shrinkage.

• Can be treated with Osmo finishes

• Permanently water repellent after curing

• Resistant to air conditions, stays elastic

• Can be sanded

• Based on 3mm gaps a 310ml tube will fill in excess of 30 linear metres

We recommend to use the Osmo Application Gun for easy application

Area Interior
Recommended Use Sealing and filling joints on interior wood, PVC, iron and aluminium joinery
Base Acrylic-based
Coverage 30 linear metres per tube based on 3mm gaps
Drying Time 1-2 Hours
Recommended Coats 1 Coat


Always ensure the surface to be treated is clean, dry and free from any dust or grease.

• No primer is required for non-porous surfaces

• On porous surfaces such as concrete, stone, cement and plaster a primer (a mixture of one part acrylic sealant and 4-5 parts of water) can be applied


Always do a test area to ensure you are happy with the finished product.

• Cut the dome of the tube with a sharp knife, taking care not to damage the thread

• Attach the nozzle, cut the end of the nozzle at an angle and size to suit application

• Application temperature is between 5°C - 40 °C

• Osmo Gap Sealer can be applied to gaps and joints of between 5mm – 25mm

• Immediately after application, smooth sealant with a wet finger or a wet tool

• Excess sealant can be removed with a damp cloth

• The sealant should be left to dry for at least 2 hours

• Product will be cured after 24hours and can be sanded

Note: Always follow the manufacturer instructions found on the tin.


All orders placed on a working day before 3pm will be dispatched on the same day for next working day delivery. Orders placed before 3pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day.

Delivery Charges 



Next Working Day




Certain postcodes delivery times and charges may vary please see our list below of effected postcodes. Please contact us prior to ordering, alternatively please ensure your number is on your order and we will contact you to discuss the best delivery method and charges.

AB37 - AB38

IV40 - IV56

PA42 - PA49

AB44 - AB45



AB53 - AB56

IV9 - IV12

PA61 - PA78

CA18 - CA27

KA27 - KA28

PA80 - PA88

HS1 - HS9

KW (All postcodes)

PH17 - PH26

Isle of Man (All IM postcodes)

LA15 - LA23

PH30 - PH44

IV14 - IV29


PH49 - PH50

IV30 - IV32

PA21 - PA38

TR21 - TR25



GY1 - GY10

ZE (All postcodes)

GY1 - GY10

JE1 - JE5

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We offer a no quibble 14 day money back guarantee for all goods shipped correctly that are not required. If the item is not required, please send the item back for a full refund in its original condition, unused with its original packaging. 

We keep the process simple

  • Contact us as soon as possible to inform us you will be returning the product.
  • Please include the original packing slip in the box, if this is unavailable please include a slip with your order number and name.
  • Package the goods well to ensure they arrive back undamaged, we recommend using the original packing it was sent in if this is still usable.
  • Return to our address:
Unit 20 
Adlington Business Park
SK10 4NL

Return postage will be at your own cost. We always advise you send parcels with a tracked service as we cannot be held responsible for any loses/damages in transit. We recommend using a courier site such as Parcel Monkey. Once goods are received they will be checked and processed within 3-5 days and you will receive a notification of refund.

Please note any bespoke items or mixed to order can not be returned, if you are unsure this is your product please check the listing or contact us for details.
We always recommend getting samples or contacting us for free of charge colourcharts. We do our best to represent colours as accurately as possible however screens variations and different surfaces can alter this. Unfortunately in the event you do not like the colour we are unable to accept the product back if they it has been opened.

Damaged Paint

Please visit our damages page where we can help resolve the issue for you. 

Incorrect Item

We will be happy to organise an exchange for the correct goods at no extra charge to yourself, please call us to organise this.

Faulty Items

If you find a fault with your product, we can offer a full refund or exchange within 30 days. We test every product that is returned to us, sadly if a product is found to have no fault we cannot refund this and the you will be given the option to have this returned to you. Please contact us to discuss these options. If you find fault after 30 days of purchase you may wish to contact the manufacturer directly as they will be able to offer support with the product.



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