Bostik Liquid Cork Expansion Joint Filler 500ml
Bostik Liquid Cork Expansion Joint Filler 500ml is backordered and will ship as soon as it is back in stock.
Free next-working-day delivery Eligible mainland UK postcodes FREE
| Area | Excluded postcodes |
|---|---|
| North-east Scotland | AB31–AB45, AB51–AB56 |
| Central & northern Highlands | FK19–FK21; all IV |
| Outer Hebrides | All HS |
| Arran & Cumbrae | KA27–KA28 |
| Caithness, east Sutherland & Orkney | All KW |
| Argyll & Inner Hebrides | PA21–PA38, PA41–PA49, PA60–PA78 |
| Perthshire & western Highlands | PH1 1, PH1 3, PH1 4, PH5–PH10, PH15–PH26, PH30–PH44, PH49–PH50 |
| Shetland | All ZE |
| Northern Ireland | All BT |
| Channel Islands & Isle of Man | All GY, JE & IM |
| Isles of Scilly | TR21–TR25 |
Need delivery outside our standard area? Please contact us before ordering and we’ll check whether a separate service can be arranged.
Click & Collect Salisbury Trade Counter FREE
Bostik 3070 Liquid Cork Expansion Joint Filler is a ready-to-use cork perimeter sealant designed for filling expansion joints and movement gaps between wood flooring and other floor finishes.
Made from natural cork granules held within a solvent-free binder, it is supplied in a 500ml foil sausage and applied using a compatible sausage gun. It provides a quick and convenient alternative to traditional cork strips, particularly around irregular edges, hearths, thresholds and floor transitions.
Why Choose Bostik 3070?
- Suitable for expansion joints up to approximately 5mm wide
- Made from natural cork granules
- Quick-drying formulation
- Can be sanded once fully dry
- Excellent thermal insulation properties
- Excellent acoustic insulation properties
- Easy gun application into straight or irregular joints
- Natural cork colour
Typical Applications
- Expansion joints in parquet and wood flooring
- Laminate flooring expansion gaps
- Transitions between wood, ceramic and other floor finishes
- Fireplace and hearth perimeters
- Door frames and thresholds
- Irregular joints where rigid cork strips are difficult to fit
- Sound and thermal insulation around suitable window and door frames
Professional Tip:
Use masking tape along both sides of the joint before application. This
protects the surrounding flooring and helps create a clean, precise edge
when the liquid cork is smoothed with a filling knife or spatula.
Technical Information
| Product type | Cork perimeter sealant and expansion joint filler |
|---|---|
| Composition | Natural cork granules with a solvent-free binder |
| Pack size | 500ml foil sausage |
| Colour | Natural cork |
| Consistency | Visco-plastic |
| Maximum joint width | Up to approximately 5mm |
| Approximate coverage | Approximately 12 linear metres from a 5 × 5mm joint |
| Application temperature | Approximately +5°C to +35°C |
| Drying time | Approximately 6–12 hours |
| Return to use | Allow approximately 24–48 hours after application |
| Temperature resistance | Approximately -30°C to +120°C |
| Application tool | Compatible foil sausage or liquid cork application gun |
| Shelf life | Up to 12 months in the original unopened packaging |
| Storage | Store between +5°C and +25°C in cool, dry conditions |
Coverage and drying times are approximate and will vary according to the joint dimensions, application depth, temperature and site conditions.
Preparation
- Ensure the joint and surrounding surfaces are clean and dry.
- Remove all loose dust, debris and contamination.
- Apply masking tape to both sides of the joint for a clean finish.
- Ensure the required expansion gap complies with the flooring manufacturer's instructions.
Application
- Place the 500ml foil sausage into a compatible application gun.
- Cut the sausage carefully and fit a suitable application nozzle.
- Apply Bostik 3070 evenly into the prepared expansion joint.
- Ensure the joint is filled consistently without leaving hidden voids.
- Smooth the surface using a putty knife, filling knife or spatula.
- Remove excess material and carefully lift the masking tape away.
- Clean tools immediately after use with warm, soapy water.
- Allow approximately 24–48 hours before returning the area to normal use.
Recommended Accessories
- Compatible foil sausage application gun
- Application nozzle
- Masking tape
- Filling knife or spatula
Important: Bostik 3070 is intended for joints up to approximately 5mm wide. Always maintain the expansion gap specified by the flooring manufacturer. Dried material can only be removed mechanically, so clean tools and surrounding surfaces immediately after application.
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.