Waterproofing

Waterproofing mortars, liquid membranes, sealing tapes, collars and roof coatings for bathrooms, basements, roofs and balconies. Choose by surface and exposure.

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Waterproofing

Water plug mortar Metric Ultracem 4x5 kg - pallet of 24 boxes K49366€ 2012,47 incl. VATView product →

Waterproofing mortar Metric Osmotic grey 25 kg - pallet of 30 bags K49368€ 1786,87 incl. VATView product →

What are you looking for?

Choose a type. Each group has its own range and filters.

Basement & concrete waterproofing

Sealing tapes collars & drains

Waterproofing under tiles

Roof & balcony waterproofing

A bathroom or roof to seal? Read this first

Practical guides from Saniso.

Waterproofing a wet room before tiling: Kerakoll way

Waterproofing a wet room before tiling, the Kerakoll way: Aquastop membranes, tapes, corners and drains, primer and Biogel adhesive explaine

Proshower: building a level walk-in shower with Progress Profiles

Fall, waterproofing, drain and edge profiles as one build-up.

Reseal your bathroom with new silicone: step by step

Old, mouldy silicone in your bathroom?

Ordering for a complete job?

Combine waterproofing with everything else you need on one project list and request a single quote. Want advice first? Book an appointment in the showroom or online.

How the project list works Book an appointment

Frequently asked questions about waterproofing

Is your question not listed? View all frequently asked questions or get in contact.

Seal the floor and the walls with a liquid waterproofing membrane, applied in two coats with reinforcing mesh in the corners. Sealing tapes, corner pieces and collars make the connections to walls, pipes and drains watertight.

View waterproofing under tiles

A liquid roof coating is applied to a clean, primed surface, with reinforcing fleece in the seams and at the upstands. There are coatings for walkable surfaces and coatings that keep their colour as a finish.

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Water plug mortar is pressed into a leaking spot in a concrete wall or floor and sets quickly, which stops the water flow. The surface is then finished with an osmotic waterproofing mortar that keeps moisture out of the concrete.

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Yes: the transition from floor to wall and the points around pipes and drains are where water gets behind the tiles. Sealing tape, corner pieces and sealing collars are embedded in the first coat of the membrane.

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How to choose waterproofing

Look at the surface and at what the water does. A wall that is damp from the outside needs a waterproofing mortar, a leaking crack needs water plug mortar, and a shower floor needs a membrane that the tiles can go straight onto.

Then look at the details: internal and external corners, pipe penetrations and drains determine whether the whole surface stays dry. Tapes and collars are part of the system, not an extra, so take them from the same range as the membrane.