[email protected]
Waterproofing Systems

Cementitious Waterproofing in Saudi Arabia

Cementitious waterproofing is a cement-based protective coating applied to concrete and masonry to reduce water penetration. SolidDrops supplies and supports cementitious waterproofing in Saudi Arabia for water tanks, basements, wet rooms, roofs, balconies and concrete repair interfaces, including surface preparation and detailing at joints and penetrations.

Jeddah · Riyadh · Dammam Tanks · Basements · Wet areas +966 50 213 1112 — 24/7

Cementitious waterproofing at a glance

Key facts about cementitious waterproofing supplied by SolidDrops in Saudi Arabia
PropertyDetail
System typeCement-based coating for concrete and masonry
Typical useWater tanks and reservoirs, basements, bathrooms, kitchens, balconies, roofs, retaining walls
System familiesFlexible cementitious coatings, crystalline waterproofing, repair mortars and fillets, mesh and primers
SubstratesStructural concrete, blockwork and render, screeds, repaired concrete interfaces
Detailing requiredWall–floor junctions, pipe penetrations, concrete cold joints
Finish over coatingTile adhesive, screed or protection layer, depending on the area
Coverage & thicknessPer the selected product datasheet — confirm before ordering
Cure timesPer the selected product datasheet — confirm before ordering
Service coverageJeddah, Riyadh, Dammam, Jubail, Makkah, Madinah, Tabuk and across Saudi Arabia

What cementitious waterproofing is and where it works

Cementitious waterproofing is a cement-based coating that bonds to concrete or masonry and resists the passage of water through the surface it covers.

The material arrives as a powder, or as a powder plus a liquid polymer component, and is mixed on site and applied by brush, roller or spray. It bonds to the substrate rather than sitting on it as a loose sheet, which is what makes it suited to structures that hold water from the inside — tanks and reservoirs — as well as slabs and walls that need to keep water out. Because the finished coating is mineral-based, it accepts tile adhesive, screed or a protection layer directly in most wet-area build-ups, which removes a step compared with membranes that need a separating layer. That single property is the reason it remains the default choice under bathroom and kitchen tiling across most of the Kingdom.

Where it is less suited is movement. A rigid cementitious coating follows the substrate it is bonded to, so any crack that opens later will telegraph through unless the system selected is a flexible grade or the detail is designed to accommodate the movement. On roofs and decks exposed to full Saudi summer thermal cycling, that distinction decides the specification, not the price per square metre.

Common applications

  • Water-retaining structures — potable and non-potable tanks, reservoirs, sumps and pits
  • Below-grade — basement walls and slabs, lift pits, retaining walls
  • Wet areas — bathrooms, kitchens, laundries, wet rooms under tile
  • Exposed horizontal — balconies, service slabs, planter boxes, roof areas
  • Repair interfaces — wall-to-floor junctions, pipe penetrations, concrete cold joints and construction joints
Typical wet-area build-up over cementitious waterproofing Cross-section showing, from the bottom up: structural concrete slab, repair mortar and coved fillet at the wall junction, primer, two coats of cementitious waterproofing with reinforcing mesh at the junction, tile adhesive and floor tile. Tile Tile adhesive Coat 2 Coat 1 Primer Concrete slab Mesh at junction Coved fillet
Typical wet-area build-up. Order of work runs bottom to top: sound slab, repair mortar and coved fillet at the wall junction, primer, first coat with reinforcing mesh worked into the junction, second coat, then tile adhesive and tile. Number of coats and thickness follow the selected product datasheet.

Cementitious waterproofing systems we supply

Flexible cementitious coatings

Two-component systems combining cement powder with a polymer liquid. The polymer gives the cured film the ability to bridge fine substrate movement, which is why these grades are specified on decks, balconies and structures that see thermal cycling.

Crystalline waterproofing

Reactive cement-based products that form crystals within the concrete pore structure. Used where the waterproofing has to work from the negative side, or where the finished surface will be abraded and a surface film would not survive.

Repair mortars and fillets

Cement-based mortars for making good honeycombing, tie holes and damaged concrete, and for forming the coved fillet at wall–floor junctions before the coating goes on. Detailing failures start here more often than material failures do.

Mesh, primers and accessories

Reinforcing mesh and tape for joints and penetrations, primers for absorbent or dusty substrates, and waterstops. These are the line items most often cut from a BOQ and most often the reason a tank leaks.

Selecting between these is a substrate-and-exposure question. A dry basement wall with no movement joints and a tiled bathroom floor over a suspended slab do not take the same product, even though both are described as cementitious waterproofing on a bill of quantities. Send us the drawings or the BOQ line and we will tell you which family applies and which datasheet governs the figures.

Section through a concrete water tank coated internally with cementitious waterproofingCross-section of a reinforced concrete water tank. The cementitious coating runs continuously over the inner faces of both walls and the base, with a coved fillet at each wall-to-base junction and a reinforced collar where the outlet pipe passes through the wall.Stored waterCoved fillet + mesh at base junctionSealed pipe penetrationReinforced concrete baseCementitiouscoating on thewetted face
Water tank, coated internally. The coating runs unbroken over both walls and the base, with a coved fillet at each wall-to-base junction and a reinforced collar at the outlet penetration. For potable tanks the product must be certified for drinking-water contact.
Detail of a coved fillet and reinforcing mesh at a wall to floor junctionEnlarged detail of the junction between a wall and a floor slab. A coved fillet of repair mortar forms the internal angle, reinforcing mesh is bedded into the first coat across the fillet, and the second coat covers the mesh before the finish is applied.WallFloor slabCoved fillet in repair mortarSecond coatFirst coatReinforcing mesh bedded into the first coat
Wall–floor junction, enlarged. The fillet removes the sharp internal angle, the mesh is bedded into the first coat while it is still wet, and the second coat buries it. Skip the fillet and the coating is asked to span a right angle it cannot bridge.

Substrate and site conditions

Cementitious systems bond mechanically and chemically to the substrate, so almost every failure traces back to what the coating was asked to stick to. Concrete must be sound, clean and free of laitance, curing compound, oil and form release agent. Surfaces are normally pre-wetted to a saturated surface-dry condition so the substrate does not pull mixing water out of the coating — a real risk in Jeddah and Dammam where slab temperatures climb well past ambient by mid-morning.

Heat and timing. In Saudi summer conditions, working time shortens and flash-set becomes a live problem. Application is scheduled early or late in the day and the substrate is shaded or cooled where practical. Specific temperature limits and pot life come from the product datasheet, not from a rule of thumb.

What has to be right before the first coat

  • Structural cracks identified and treated as cracks, not covered over with coating
  • Honeycombing, tie holes and spalled areas made good with a compatible repair mortar
  • Coved fillets formed at all wall–floor junctions
  • Pipe penetrations sealed and reinforced with mesh or tape
  • Standing water removed; substrate damp but not ponded
  • New concrete cured for the period the datasheet requires before coating
Concrete substrate before and after preparation for cementitious waterproofingTwo panels. The left panel shows an untreated slab with laitance, honeycombing, an unfilled tie hole and a crack. The right panel shows the same slab after the laitance has been removed, the defects made good with repair mortar and the surface pre-wetted to a saturated surface-dry condition.Before preparationHoneycombingTie holeCrackLaitance layerCoating applied here bonds to a weak surface, not to the slab.After preparationRepairs made good in compatible mortarSurface pre-wetted, damp but not pondedSound, clean and saturated surface-dry — ready for the first coat.
Substrate preparation. Laitance removed, honeycombing and tie holes made good in a compatible mortar, cracks treated as cracks rather than coated over, and the slab pre-wetted so it does not draw mixing water out of the first coat.
Positive-side versus negative-side waterproofing on a basement wall Two cross-sections. On the left, the coating sits on the outer face of the wall, facing the water. On the right, the coating sits on the inner face with water pressure pushing against the wall from behind. Positive side Coating on the face the water reaches first Ground water Wall Dry side Water is stopped before it enters the structure. Negative side Coating on the only accessible face Ground water Wall Interior Water pressure pushes against the coating from behind.
Positive versus negative side. Where the excavation is open, the coating goes on the outer face. Where the only access is from inside — a completed basement, a lift pit, a retrofit — a crystalline system working against the pressure is normally the route. The choice changes the product family, not just the sequence.

How the work runs — survey to handover

  1. Site review

    We look at the structure, the exposure, the water table where it matters, and what the coating has to receive afterwards. This is also where we confirm whether the specified product actually suits the condition on site.

  2. Surface preparation

    Cleaning, removal of laitance and contaminants, repair of defective concrete, and pre-wetting to the condition the datasheet calls for.

  3. Mixing and detail treatment

    Materials mixed to the stated ratio with mechanical mixing. Fillets, joints and penetrations are treated first, before any general coating goes down — the details are the waterproofing.

  4. Application and curing

    Coats applied in the number and direction the system requires, each allowed to set before the next. Curing is protected against wind and direct sun, which in Saudi conditions is an active task rather than a note on a method statement.

  5. Testing, protection and handover

    Water tanks and wet areas are flood-tested where the specification calls for it. The coating is then protected before following trades come in, and we hand over the product data and the applied build-up for the record.

Choosing between cementitious and other waterproofing systems

SystemBest suited toMain limitation
CementitiousWater tanks, basements, wet areas under tile, repair interfacesRigid grades follow substrate movement; needs sound concrete
PolyureaFast-turnaround, joint-free coverage on large or complex geometrySpray equipment and trained applicators required
Polyurethane (PU)Exposed roofs and decks needing elasticitySurface preparation and moisture in the substrate are critical
Bituminous membranesBelow-grade tanking, large flat roof areasLaps and terminations are the usual leak path; not for potable tanks

In practice these systems combine more often than they compete. A basement may be tanked with a membrane and have its internal repair interfaces treated with a cementitious product; a tank may be coated cementitiously and sit under a roof slab finished in something else entirely. If you are weighing options for a specific structure, our waterproofing systems overview sets out the full range, and the water tank coating page covers potable-water requirements in more detail.

Supply and site support across the Kingdom

SolidDrops supplies cementitious waterproofing materials and supports application in Jeddah, Riyadh, Dammam, Jubail, Makkah, Madinah and Tabuk, and across the rest of Saudi Arabia. أهلاً وسهلاً — contractors, consultants and facility teams are welcome to send a BOQ line, a drawing extract or a photograph of the condition, and we will come back with the system that suits it and the datasheet figures that govern it.

Related ranges: epoxy flooring for the finished floor over a waterproofed slab, construction chemicals for admixtures, repair mortars and joint sealants, and FRP panels for wall linings in wet production areas.

Frequently asked questions

Is cementitious waterproofing suitable for water tanks?

Yes. Tanks and reservoirs are one of its main applications, because the coating bonds to the concrete and resists water pushing from the inside. For potable water the product must be certified for drinking-water contact, so confirm that against the specific product datasheet before ordering. Detailing at wall–floor junctions and pipe penetrations matters as much as the coating itself.

Can cementitious waterproofing be used in a basement?

Yes, on both the positive and negative side depending on the system chosen. Crystalline products are commonly used where the water pressure comes from outside and the only accessible face is internal. Sound concrete, treated cold joints and properly sealed penetrations decide whether the basement stays dry — the coating alone will not compensate for an untreated joint.

What is the difference between flexible and rigid cementitious waterproofing?

Rigid systems are cement-based only and follow the substrate exactly, so they suit stable structures such as tanks and basement walls. Flexible systems add a polymer component, which lets the cured film bridge fine movement and hairline cracking. Decks, balconies and anything exposed to heavy thermal cycling normally call for a flexible grade.

Can you tile directly over cementitious waterproofing?

In most wet-area build-ups, yes — the coating is mineral-based, so tile adhesive bonds to it without a separating layer. The coating must be fully cured first, and the adhesive must be compatible with the waterproofing product. Check both datasheets before the tiler starts; this is a common sequencing clash on fit-out programmes.

How much does cementitious waterproofing cost in Saudi Arabia?

Cost depends on the system family, the number of coats and the thickness the specification calls for, the condition of the substrate and how much repair work it needs, the amount of detailing at joints and penetrations, and access. Two tanks of the same area can differ substantially on the repair scope alone. Send the BOQ line or the drawings and we will price the scope as specified.

How long does cementitious waterproofing take to cure?

Cure and overcoating times are set by the specific product and by site temperature and humidity, and they are stated on that product's datasheet. In Saudi summer conditions the working time is shorter than the datasheet's reference temperature implies, so programming is done against the datasheet plus site readings, not against a general figure.

Which cities do you cover?

SolidDrops covers Jeddah, Riyadh, Dammam, Jubail, Makkah, Madinah and Tabuk, and supplies across the rest of Saudi Arabia. Call +966 50 213 1112 to confirm availability and lead time for your location and quantity.

Cementitious or polyurea — which should I specify?

Cementitious suits tanks, basements, wet areas under tile and repair interfaces, where a bonded mineral coating is wanted. Polyurea suits large or geometrically complex areas where a fast-setting, joint-free elastomeric coating is the requirement and spray equipment is available. The exposure and the finish the surface has to receive usually decide it.

Send us the scope

Share a BOQ line, a drawing extract or a photo of the condition. We will confirm which cementitious system applies, quote the scope as specified, and provide the datasheet figures your consultant will ask for.

Call +966 50 213 1112 Request a quotation
WhatsApp contact iconChat Online
1