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Liquid cork sealant Bostik 3070

“If my floor looks fine, why bother with expansion joints?” — Sound familiar? It’s a common thought, but skipping this small step can set you up for major issues down the line. Without proper expansion space, floors can start to buckle, squeak, or crack over time — and that usually means an expensive, stressful replacement project. Bostik 3070 liquid cork is specially formulated to seal floor expansion joints, helping to preserve your floors and prevent costly surprises in the future.




Got questions? We’ve got the info you’re looking for – right here!

WHAT EXACTLY IS BOSTIK 3070 LIQUID CORK?

Bostik 3070 is a ready-to-apply sealing solution created from genuine natural cork. It’s designed in liquid form, making it super versatile for filling spaces and adapting to irregular surfaces. The product is packaged in user-friendly cartridges for easy dispensing.

WHERE CAN YOU USE BOSTIK 3070?

This product is primarily used to seal expansion joints between different flooring types – like tile, wood, and laminate – and is ideal for gaps up to 5 mm. It helps protect your floor from damage caused by seasonal changes in moisture and temperature.

It also performs great in tricky or tight areas: corners, door frames, wall junctions, or fireplace surroundings – places where traditional cork strips just won’t work.

HOW DO YOU APPLY LIQUID CORK?

The easiest way is by using the Bostik 3070 cork applicator gun. Built with durable metal parts, this tool ensures smooth and precise application without mess or waste. It’s efficient, user-friendly, and helps you get the job done right.

WHY DOES YOUR FLOOR NEED AN EXPANSION JOINT?

Floors expand and contract throughout the year – it’s a constant cycle. Without a flexible joint to absorb that movement, your floor can buckle, crack, or lift. Bostik 3070 helps maintain the integrity of your floor by allowing it to flex as needed.


Skipping expansion joints is a mistake you might not notice right away. But over time, especially with changing seasons, you’ll start to see warped planks or hear annoying creaks. Fixing those issues isn’t cheap. Using Bostik 3070 is a smart, low-effort way to stop the damage before it starts. All it takes is a few minutes and a steady hand – no contractor required.


And let’s not forget the visual aspect. Regular expansion profiles are often bulky and unsightly. Liquid cork provides a cleaner, more natural finish. Its warm tone blends right into the floor, making your space look seamless.


What makes Bostik 3070 different? It’s not rigid like traditional cork strips. It’s a malleable compound that fills, seals, and adapts to shape – perfect for areas that need flexible sealing solutions, including doors, windows, corners, and odd-shaped spaces.


And here’s something to feel good about: cork is completely natural and renewable. Most expansion fillers sold in stores are synthetic, often made from plastic. Choosing Bostik 3070 is a way to build responsibly – without adding to landfill waste.

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