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4.76 USD
Yaseen Construction Products supplies Swellable Water Bars, also known as Hydrophilic Waterstops, for sealing approved construction joints in concrete structures exposed to water or groundwater.
Swellable water bars are manufactured using water-reactive materials that expand when exposed to moisture. When correctly selected, confined and installed within a concrete joint, the expansion helps restrict water movement through the joint interface.
Swellable Water Bar is a hydrophilic joint sealing material used to reduce water penetration through approved construction joints in concrete structures.
It is also commonly called a Hydrophilic Waterstop, Swelling Waterstop, Swellable Waterstop Strip or Water Swelling Bar.
The product is installed along the specified joint line before the adjoining concrete section is poured.
When exposed to water, the material absorbs moisture and expands. This expansion creates pressure against the surrounding concrete, helping restrict water movement through the joint interface.
Swellable water bars are used in basement construction, foundations, retaining walls, water tanks, tunnels, underground structures and other concrete waterproofing applications.
Yaseen Construction Products sources swellable water bars for waterproofing contractors, civil engineering companies, infrastructure developers, concrete contractors and construction procurement teams.
A swellable water bar is a preformed hydrophilic sealing strip designed for use within suitable concrete construction joints.
It is commonly manufactured using:
Hydrophilic rubber.
Bentonite-based compounds.
Water-reactive polymers.
Polymer-modified sealing compounds.
The material reacts to water exposure by increasing in volume.
When properly confined within concrete, this expansion can help seal the joint against water penetration.
A swellable water bar is not a general-purpose external waterproofing membrane.
It is a joint sealing component within a specified waterproofing system.
A swellable water bar is installed against a prepared concrete surface at the intended construction joint.
The next concrete section is then placed over the water bar.
When water reaches the joint, the hydrophilic material absorbs moisture and swells.
The expansion helps fill small irregularities and restrict potential water paths.
Performance depends on:
Water bar formulation.
Swelling capacity.
Swelling pressure.
Joint confinement.
Concrete cover.
Joint surface condition.
Water pressure.
Water chemistry.
Installation quality.
Concrete compaction.
Adequate confinement is essential. Uncontrolled swelling without sufficient concrete restraint may damage the surrounding concrete or reduce sealing effectiveness.
Hydrophilic rubber water bars contain water-reactive compounds within a rubber-based formulation.
They are commonly used in approved concrete construction joint waterproofing systems.
Bentonite-based water bars contain swelling clay materials, often combined with rubber or polymer binders.
They are used in suitable concrete construction joints where the product’s water chemistry and pressure requirements are satisfied.
Polymer-based water bars use hydrophilic materials designed to expand after water exposure.
The formulation determines swelling characteristics and long-term performance.
Some products are formulated to delay the onset of swelling.
This can help reduce premature expansion caused by rain or temporary site moisture before concrete placement.
The delay period must be verified from manufacturer data.
Selected products are formulated for exposure to saline or chemically aggressive water.
Ordinary freshwater swelling performance should not be assumed to apply in seawater.
Certain products are tested for specified hydrostatic pressure resistance.
Pressure ratings apply only to the tested product and installation configuration.
| Parameter | Specification / Selection Criteria |
|---|---|
| Product | Swellable Water Bar |
| Alternative Names | Hydrophilic Waterstop, Swelling Waterstop |
| Material | Hydrophilic Rubber, Bentonite or Polymer-Based Compound |
| Physical Form | Preformed Strip |
| Profile | Rectangular or Manufacturer-Specified |
| Colour | Manufacturer Dependent |
| Width | Manufacturer Specified |
| Thickness | Manufacturer Specified |
| Roll Length | Manufacturer Specified |
| Swelling Capacity | Manufacturer Declared |
| Swelling Rate | Manufacturer Declared |
| Swelling Pressure | Where Tested |
| Tensile Strength | Where Applicable |
| Elongation | Where Applicable |
| Hardness | Where Applicable |
| Hydrostatic Pressure Resistance | Tested System Dependent |
| Freshwater Compatibility | Manufacturer Specified |
| Saltwater Compatibility | Manufacturer Specified |
| Chemical Resistance | Manufacturer Specified |
| Installation Adhesive | Approved Product |
| Minimum Concrete Cover | Manufacturer Specified |
| Storage Conditions | Manufacturer Specified |
| Packaging | Rolls or Coils |
Dimensions, swelling percentages and pressure ratings must be confirmed from the selected manufacturer’s technical data sheet.
Swellable water bars are manufactured in different widths and thicknesses.
Common market examples include:
10 × 20 mm.
20 × 20 mm.
20 × 25 mm.
25 × 20 mm.
Other manufacturer-specific profiles.
These dimensions are examples of commercial profiles, not a confirmed stock list.
The correct size depends on concrete thickness, cover, joint geometry and the approved waterproofing specification.
Both products are used to control water movement through concrete joints, but their sealing mechanisms differ.
| Property | Swellable Water Bar | PVC Water Stopper |
|---|---|---|
| Material | Hydrophilic Compound | Flexible PVC |
| Sealing Mechanism | Expansion on Water Exposure | Physical Barrier Embedded in Concrete |
| Typical Installation | Along Construction Joint Surface | Embedded Across Joint |
| Joint Movement | Limited, Product Dependent | Selected Profiles Accommodate Movement |
| Common Applications | Non-Moving Construction Joints | Construction and Movement Joints |
| Installation | Adhesive or Mechanical Fixing | Positioned and Secured Before Concreting |
| Selection | Water Pressure, Cover and Confinement | Joint Type, Movement and Water Pressure |
Swellable water bars are generally intended for non-moving construction joints unless a manufacturer specifically approves another application.
PVC waterstops are available in profiles designed for different construction and movement joint requirements.
An injection hose system allows suitable sealing material to be injected into a construction joint.
A swellable water bar provides a pre-installed hydrophilic seal.
Some waterproofing designs use both systems where additional protection or future injection capability is required.
The systems are not automatically interchangeable.
Joint sealants are commonly used at accessible joint surfaces.
Swellable water bars are installed within confined concrete construction joints.
Their placement, movement capability and sealing mechanisms differ.
Basement structures may be exposed to groundwater and hydrostatic pressure.
Swellable water bars can be specified at suitable concrete construction joints, including:
Wall-to-slab joints.
Wall construction joints.
Foundation interfaces.
Selected lift joints.
The waterproofing design must account for the expected water pressure and structural movement.
Swellable water bars are used in selected foundation construction joints.
Typical locations may include:
Raft foundation construction joints.
Footing-to-wall interfaces.
Foundation wall joints.
Other approved concrete interfaces.
The water bar must be positioned with adequate concrete cover and confinement.
Swellable water bars may be installed in approved retaining wall construction joints.
The design should consider:
Groundwater conditions.
Joint movement.
Concrete thickness.
Water pressure.
Joint surface condition.
Waterproofing continuity.
Selected swellable water bars are used in concrete water-retaining structures.
Applications may include:
Water storage tanks.
Underground water tanks.
Treatment tanks.
Reservoir structures.
For potable water tanks, the selected product must have appropriate drinking-water contact approval where required.
Suitable hydrophilic waterstops may be used in approved construction joints of wastewater treatment structures.
Chemical resistance must be assessed against the actual wastewater composition.
Tunnels and underground infrastructure may use hydrophilic waterstops at specified construction joints.
The product must be suitable for expected water pressure, joint geometry and installation conditions.
Lift pits are often located below ground level and may be exposed to groundwater.
Swellable water bars may be specified at suitable concrete construction joints as part of the overall waterproofing system.
Certain hydrophilic waterstop profiles are designed for sealing around approved pipe penetrations through concrete.
The product must be compatible with:
Pipe material.
Penetration geometry.
Concrete cover.
Water pressure.
Expected movement.
Not every straight water bar profile is suitable for pipe penetrations.
Confirm the joint location, water bar profile, minimum cover and fixing method.
The substrate should be structurally sound and suitable for installation.
Remove:
Dust.
Loose concrete.
Laitance.
Oil.
Grease.
Standing water.
Other contaminants.
Follow the manufacturer’s requirements for dry, damp or otherwise permitted substrates.
Use the recommended adhesive or fixing system where specified.
Install the strip along the approved joint line.
Maintain the specified distance from exposed concrete faces.
Use the manufacturer’s approved butt-joint, overlap or connection method.
Avoid unsealed gaps.
Prevent displacement during concrete placement.
Verify:
Position.
Continuity.
Fixing.
Concrete cover.
Joint connections.
Absence of premature swelling.
Place and compact concrete carefully without damaging or displacing the water bar.
Swellable water bars require adequate concrete confinement.
If installed too close to an exposed concrete face, expansion pressure may contribute to cracking or spalling.
The minimum cover must follow the manufacturer’s tested installation requirements.
It should not be selected using a generic rule without checking the product profile and structural detail.
Rainfall, standing water or prolonged exposure to site moisture may cause the water bar to swell before the next concrete pour.
Premature swelling can affect installation and sealing performance.
If the material has already expanded, follow the manufacturer’s inspection and replacement instructions.
Do not assume that a swollen strip will return to its original dimensions or remain suitable for installation.
Swelling capacity describes the material’s volume or dimensional increase under specified test conditions.
Water pressure resistance describes the performance of the installed sealing system under hydrostatic loading.
A high swelling percentage does not automatically mean a high water pressure rating.
Both properties must be evaluated separately.
Hydrophilic materials may respond differently to freshwater and saline water.
Some formulations exhibit reduced swelling in seawater or high-salinity environments.
For coastal and marine projects, confirm:
Water salinity.
Chemical exposure.
Swelling behaviour.
Pressure resistance.
Long-term durability.
Use a product specifically approved for the exposure conditions.
Possible causes include:
Incorrect water bar selection.
Insufficient concrete cover.
Gaps between lengths.
Poor fixing.
Honeycombed concrete.
Excessive joint movement.
Possible causes include:
Rain exposure.
Standing water.
Wet storage.
Delayed concrete placement.
Possible causes include:
Inadequate adhesive.
Poor mechanical fixing.
Concrete placement forces.
Possible causes include:
Insufficient concrete cover.
Excessive swelling pressure.
Unsuitable joint geometry.
Possible causes include:
Incorrect formulation.
Unverified saline-water compatibility.
Exposure outside the approved test conditions.
| Standard / Test | Relevance |
|---|---|
| ASTM D471 | Rubber property changes in liquids, where applicable |
| ASTM D412 | Tensile properties of applicable rubber materials |
| ASTM D2240 | Hardness of rubber or elastomeric materials |
| Manufacturer Swelling Test | Swelling capacity and rate under defined water conditions |
| Manufacturer Hydrostatic Test | Pressure resistance of the tested joint assembly |
| Applicable Project Waterproofing Specification | Material selection and installation acceptance |
Not every standard applies to every hydrophilic formulation.
The selected manufacturer’s test reports should establish swelling, water pressure resistance and material properties under relevant conditions.
Buyers should confirm:
Joint type.
Concrete thickness.
Minimum cover.
Required profile dimensions.
Hydrophilic formulation.
Swelling capacity.
Swelling rate.
Swelling pressure.
Hydrostatic pressure resistance.
Freshwater or saltwater exposure.
Chemical resistance.
Joint movement.
Installation method.
Required approvals.
Water bars are normally measured in linear metres.
Required length (m) = Total joint length (m) + Allowance for joints and installation losses
For example, assume:
Total construction joint length: 450 metres.
Illustrative allowance: 5%.
Required quantity:
450 × 1.05 = 472.5 metres.
If the selected product is supplied in 10-metre rolls, the illustrative requirement is 48 rolls.
Actual roll length and connection allowances must follow the selected manufacturer’s requirements.
Swellable water bars are commonly supplied in rolls or coils.
Packaging depends on:
Profile dimensions.
Material formulation.
Roll length.
Manufacturer.
Order quantity.
Export requirements.
Products should remain protected from moisture during storage and transport.
Pricing depends on:
Hydrophilic material.
Profile dimensions.
Swelling characteristics.
Pressure resistance.
Chemical resistance.
Manufacturer.
Roll length.
Order quantity.
Delivery destination.
For project comparisons, evaluate the price per linear metre for products meeting the same technical specification.
For a specification-based quotation, provide:
Project location.
Construction joint type.
Concrete thickness.
Required profile dimensions.
Total joint length.
Expected water pressure.
Freshwater or saltwater exposure.
Required test reports.
Packaging preference.
Delivery destination.
Delivery schedule.
Yaseen Construction Products supplies and exports swellable water bars for basements, foundations, retaining walls, water tanks, tunnels, underground structures and concrete construction joint waterproofing across the UAE, Saudi Arabia, Qatar, Oman, Kuwait and African countries, including Nigeria, Kenya, Ghana, Tanzania, Uganda, Ethiopia, South Africa, Egypt, Morocco, Rwanda, Zambia, Mozambique and Senegal.
We support waterproofing contractors, civil engineering companies, infrastructure developers, concrete contractors and procurement teams with specification-based sourcing, bulk quotations and international shipment arrangements.
Product availability, pricing and delivery schedules depend on formulation, profile dimensions, quantity and destination.
Water-Activated Sealing: Expands when exposed to water to help restrict leakage through approved concrete construction joints.
Construction Joint Protection: Designed for suitable non-moving joints in concrete structures.
Hydrophilic Formulations: Available in rubber-based, bentonite-based and polymer-modified materials.
Concrete Confinement: Uses controlled expansion within the surrounding concrete to support sealing.
Basement Waterproofing: Suitable grades can be used in below-ground concrete structures.
Foundation Applications: Used at approved foundation and wall-to-slab interfaces.
Water-Retaining Structures: Selected products can be used in concrete tanks and reservoirs.
Flexible Profiles: Available in different strip dimensions to suit approved joint details.
Simple Placement: Can be fixed to prepared concrete surfaces using approved adhesives or mechanical methods.
Continuous Joint Sealing: Preformed strips can be installed along extended construction joints.
Testable Performance: Swelling and hydrostatic pressure resistance can be evaluated using manufacturer testing.
Bulk Project Supply: Suitable for commercial construction, infrastructure and waterproofing procurement.
Basement Construction Joints: Sealing approved joints in below-ground concrete structures.
Raft Foundations: Waterproofing suitable foundation construction joints.
Wall-to-Slab Joints: Sealing specified concrete wall and floor interfaces.
Retaining Walls: Construction joint waterproofing in earth-retaining structures.
Underground Water Tanks: Sealing approved joints in concrete water storage structures.
Water Treatment Plants: Construction joint sealing in compatible treatment tanks.
Sewage Treatment Plants: Waterproofing joints where chemical compatibility is verified.
Tunnels: Sealing approved construction joints in underground infrastructure.
Lift Pits: Joint waterproofing in below-ground lift shafts.
Concrete Reservoirs: Sealing specified joints in water-retaining structures.
Pipe Penetrations: Use of suitable hydrophilic profiles around approved concrete penetrations.
Infrastructure Foundations: Joint sealing in suitable civil engineering structures.
A swellable water bar is a hydrophilic sealing strip used in approved concrete construction joints. It absorbs water and expands within the confined joint to help restrict water penetration.
The material absorbs water and increases in volume. When confined by suitable concrete, the expansion helps close small water paths along the construction joint.
A swellable water bar seals through water-activated expansion. A PVC waterstop acts as an embedded physical barrier. PVC profiles are available for both construction and movement joints, while swellable strips are generally used in non-moving construction joints.
It is used in suitable construction joints of basements, foundations, retaining walls, water tanks, tunnels, lift pits and other concrete structures exposed to water.
Yes, selected products are suitable for concrete water-retaining structures. Potable water applications may require specific drinking-water contact approvals.
Yes. It is commonly used at approved basement construction joints, including wall-to-slab interfaces. Product selection must account for groundwater pressure and concrete cover.
Generally, swellable water bars are intended for non-moving construction joints. Expansion joints require a sealing system designed to accommodate the specified movement.
Premature moisture exposure can cause swelling before concrete placement. The material should be inspected and replaced where required by the manufacturer’s instructions.
Some formulations are designed for saline environments, but not all products have suitable saltwater swelling performance. Marine applications require verified compatibility and test data.
The minimum concrete cover depends on the product profile, swelling pressure and joint design. Follow the manufacturer’s tested installation requirements rather than assuming a universal cover dimension.
The concrete surface is prepared, the water bar is positioned along the approved joint line and secured using the recommended fixing method. Connections and cover are checked before the adjoining concrete is placed.
Yaseen Construction Products supplies and exports swellable water bars for concrete construction joints, foundations, basements, retaining walls, water tanks and underground infrastructure across the UAE, Saudi Arabia, Qatar, Oman, Kuwait and African countries, including Nigeria, Kenya, Ghana, Tanzania, Uganda, Ethiopia, South Africa, Egypt, Morocco, Rwanda, Zambia, Mozambique and Senegal.
We assist waterproofing contractors, civil engineering companies, infrastructure developers, concrete contractors and procurement teams with specification matching, bulk quotations and international shipment arrangements.
Trusted supplier and exporter of building construction products in UAE, Saudi, Qatar, Oman & African Countries.
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