Waterproofing bathrooms | Bostik Global

Waterproof tiling in a bathroom is important to prevent water damage and leakage to the underlying structure and to ensure a durable finish. Especially in wet areas, such as the shower or bathroom, it is very important to apply a waterproof layer before installing the tiles. In this article, you will discover how to make your bathroom, shower or walk-in shower completely waterproof with kim tape and the right products from the Bostik Seal & Block range.

How can you waterproof a bathroom?

To waterproof a bathroom, you need a combination of:

a waterproof membrane (such as BLOCK X911 TERRA TURBO LIGHT 2K),
sealing tape for the joints and corners

This combination forms a waterproof base for the tiling. The connection between walls and floors is particularly susceptible to leaks, so it is crucial to apply the sealing tape correctly.

What do you use to waterproof a bathroom?

For a waterproof bathroom, use products from the Bostik Seal & Block range:

BLOCK X911 TERRA TURBO LIGHT 2K: a flexible, crack-bridging membrane.
Kimband: specially designed for corners and joints.

These products are easy to apply, quick-drying and ensure a perfectly waterproof finish. The system remains reliable even with intensive use.

Where do you place kimband in a bathroom?

Apply kimband to:

the connections between walls and floors,
corners of the walk-in shower,
transitions around the shower tray

Thanks to the flexible nature of the tape and the membrane, movement in the substrate is absorbed without affecting the waterproofing.

Applying Kimband? Here's how!

Applying Kimband is easy with this step-by-step plan:

Ensure that the substrate is clean, dry and free of dust.
Apply a layer of BLOCK X911 TERRA TURBO LIGHT 2K using a trowel.
Press the kimband directly into the wet paste, without creases or air bubbles.
Apply a second layer of paste over the kim tape.

For the rest of the bathroom, apply BLOCK X911 TERRA TURBO LIGHT 2K in two layers for a completely sealed finish.

Can I waterproof my bathroom myself?

Yes, with the right materials, it is perfectly possible to waterproof a bathroom yourself. Thanks to Bostik's user-friendly Seal & Block products, the system is easy to apply. To ensure a lasting waterproof result, make sure you follow each step carefully.

Is a drip edge strip mandatory in the bathroom?

Although not legally required, most manufacturer guidelines strongly recommend using waterproof tape in the bathroom. The risk of leakage is particularly high in corners and transitions. Waterproof tape provides extra security and, together with the membrane, forms an ideal combination for a guaranteed waterproof finish.

How can I waterproof my existing bathroom?

When renovating or replacing tiles on the shower floor or wall, it is advisable to completely re-treat the substrate:

Remove old sealant and grout residues.
Clean the surface thoroughly.
Apply kimband where necessary.
Finish with BLOCK X911 TERRA TURBO LIGHT 2K for complete protection.
Then install the new tile finish.

Creating a walk-in shower? Don't forget the kim tape

When creating a walk-in shower, a waterproof floor is essential. Use kimband in all corners of the shower floor, the wall connections and at the transition to the rest of the bathroom. Combine this with a double layer of BLOCK X911 TERRA TURBO LIGHT 2K for a guaranteed waterproof shower floor.

Waterproofing a shower? Here's how it works

A shower is the place where leaks often occur. Waterproofing the shower correctly prevents moisture problems in the floor and walls. Pay attention to these points:

Apply a waterproof tape to all joints in the bathroom.
Finish with BLOCK X911 TERRA TURBO LIGHT 2K.
Use a flexible and waterproof grout, such as ARDACOLOR FLEX, to finish the tile joints.

This will prevent water from seeping under the tiles in the bathroom.

Waterproof bathroom without tiles?

Want a sleek concrete look or other finish without tiles? Then a waterproof membrane is also essential. Apply it over the entire floor and walls and finish with a suitable top coat.

Conclusion

A well-waterproofed bathroom starts with careful preparation and the use of the right materials. With Bostik's Seal & Block products, such as kimband and BLOCK X911 TERRA TURBO LIGHT 2K, you can create durable protection against moisture, leaks and mould.

Whether you are building a new walk-in shower or renovating an existing bathroom, the Seal & Block solution makes it possible. Make sure you work in the correct order and enjoy a waterproof bathroom for years to come.