FAQs
Effective waterproofing prevents water infiltration, which can cause structural damage, deterioration, mold growth, and costly repairs. It also helps extend the lifespan of buildings and infrastructure.
Bathrooms need under-tile waterproofing membranes that are flexible, seamless, and compatible with tile adhesives. Liquid membranes or cementitious systems protect against water ingress into slabs and walls. All corners, joints, drains, and pipe penetrations must be reinforced to prevent hidden leaks. Explore Sika's waterproofing range here.
No. Standard paint cannot prevent water penetration. Waterproofing requires specialized membranes, coatings, or admixtures, such as SikaTop® or SikaProof® systems, which are designed to block moisture and resist structural water pressure.
Yes, but only if the source of the leak is properly identified first. Sika solutions, like liquid-applied membranes or cementitious mortars, can repair and prevent further water penetration in walls, roofs, and wet areas.
Waterproofing can fail due to poor surface preparation, incorrect application thickness, ignored joints or corners, and low-quality materials—so always use professional guidance and Sika-certified products.
Most waterproofing systems require two coats applied at right angles to each other to ensure full coverage and eliminate pinholes. Some high-build or spray-applied membranes may need only one coat if the specified thickness is achieved. Always refer to the Sika's product data sheet for best practices.
Waterproofing powders are commonly integral admixtures added directly to cement or concrete to reduce water absorption. They are cost-effective and widely available. Sikalite® is a typical example, dosed at 1 kg per 50 kg bag of cement, as recommended. Click here for more information.
Yes, Sika offers full support from initial consultation through to site application, with expert technical guidance to help you select and apply the best waterproofing system for your specific project needs. Contact one of our technical waterproofing experts here. https://nga.sika.com/en/contact.html