Sika® Mono Plug - Fast Leak-Stopping Mortar

Sika® Mono Plug is a fast-setting cementitious sealing mortar for stopping water ingress and active leaks. The product is used locally where a leak needs to be blocked quickly before a subsequent waterproofing or repair system is applied.

When to choose Sika Mono Plug?

Choose Sika® Mono Plug for serious water leaks in foundation structures, basements and cellars, lift shafts, underground garages, storage rooms, tanks, cisterns, drainage systems and tunnels. This is a product for rapid leak sealing, not a complete waterproofing system for the entire surface.

Main advantages

• Sets very quickly and stops water ingress.
• Can be used dry or as a mortar after adding water.
• Ready-to-use cement-based powder composition.
• Chloride-free and does not cause corrosion of steel.
• Suitable for local leaks in concrete and underground structures.

Technical guidance from the TDS

Application on leaks

For wet application, the product is mixed with water and applied to the leaking area. For dry application, the dry compound is pressed directly onto the leaking area until the material hardens. If the water is under pressure, the TDS recommends first draining it using a hose.

Important limitations

• Mix only small quantities with water, because the product sets very quickly.
• Do not use material that has hardened before application.
• Wear protective gloves and safety glasses during application.
• After the leak has been stopped, a separate waterproofing or repair system is often required for a durable solution.

Before ordering

Send a photo or video of the leak, the type of structure and whether the water is under pressure. This helps assess whether Sika® Mono Plug is sufficient as a first step and what subsequent waterproofing is required.