Waterproofing is crucial to prevent expensive and irreversible damages to building structures.

You can protect your next project against water infiltration with our tested systems and products, to avoid future problems and costs.

Selecting a suitable waterproofing solution from the beginning is important to avoid issues emerging later.

Advantages of Sika Waterproofing Solutions

Keeping water in or out of long-lasting structures, such as tunnels, bridges, basements, or balconies can be very challenging.

Sika consider the entire waterproofing process to the very last detail and can provide solutions for both new build and renovation projects.

Waterproofing failure and leaking are some of the most problematic scenarios especially during the monsoon season. Our systems ensure you get a premium solution to safeguard and protect your projects.


 Check out our waterproofing from basement to roof page or contact our specification team if you require assistance for your project.

Sika Supports in Waterproofing Projects

Below grade basement waterproofing with sheet membrane system
Waterproofing solutions for tunnels
Retention pond in grassy mountains with potable water
Waterproofing Ponds
Interior of public drinking water reservoir in Offenberg Germany with Sikaplan waterproofing membrane
Sport center sauna spa footbath with tile floor adhesive in Fitnesspark Allmend Switzerland
Wet Room Waterproofing
Sedimentation tank in waste water treatment plant in Wroclaw in Poland

Reference Projects


What is cementitious waterproofing mortar?

Cementitious waterproofing mortar is a ready-mixed waterproofing compound used to protect structures against water infiltration. They are supplied as ready-to-use solutions either in one single component or two-component packs to seal against damp soil, seepage and percolating water. In addition, cementitious waterproofing mortar can also be used for the protection of concrete structures. Waterproofing mortars are often applied in water reservoirs, water retaining structures, basements, and other engineering structures as well as beneath tiling for swimming pools, balconies, bathrooms, and kitchens.

What is the difference between rigid and flexible waterproofing?

Rigid cementitious waterproofing mortar is typically hard and non-deformable, whereas flexible cementitious waterproofing mortar is soft and deformable.

What waterproofing products shall I use for toilets, bathrooms, and kitchens?

In general, any cementitious based mortar and liquid applied bituminous coating are suitable be used for these areas.

What waterproofing products shall I use for swimming pools under tiles (both floor and wall)?

Sikalastic®-1 KMY, a one component fiber reinforced, flexible cementitious waterproofing is the recommended product for swimming pool waterproofing before tiles for both wall and floor.

How do I waterproof the downpipe area?
  • To apply sealant in the prepared groove around the circumference between the PVC pipe and the concrete slab.
  • To apply bituminous coating on the slab around the circumference of the PVC pipe and over the joint between the concrete and the pipe down to the internal wall of the PVC pipe.
How do I waterproof gypsum wallboard?

Due to the porosity of the gypsum surface, Sika recommends a primer coat before the application of cementitious waterproofing. Sika® Primer-11 WMY is required prior to the application of SikaTop® Seal-107 (MY), SikaTop® Seal-109 MY and Sikalastic®-1 KMY.  

Sika has over
100 years
of waterproofing experience, since the first Sika waterproofing product was invented in 1910.
With 50 years of experience, Sikadur Combiflex SG System, the leading solution in adhered tapes, is sold in nearly 90 countries where more than
40,000 km
of tapes have been applied!
3.3 million
square meters of Sikaplan® waterproofing membrane, equivalent to about 330 football fields, was used on the Gotthard Base Tunnel, the longest railway tunnel in the world.