Integral Crystalline Waterproofing for Water Tanks, Treatment Plants, and Concrete Reservoirs
Water tank waterproofing in the Philippines is essential for protecting concrete water tanks, sewage treatment plants (STPs), water treatment facilities, and reservoirs against leakage and deterioration.
At AVA Concrete Protection, we supply Xypex crystalline waterproofing solutions that help reduce concrete permeability and improve long-term durability. Furthermore, our integral waterproofing technology supports reliable water-retaining structures exposed to continuous moisture and hydrostatic pressure.
How Xypex Integral Crystalline Waterproofing Works
Xypex Admix C-Series provides integral crystalline waterproofing for concrete water tanks and other water-retaining structures. Contractors incorporate the admixture directly into the concrete during batching. Once added, its proprietary active chemicals react with moisture and cement hydration byproducts.
As a result, insoluble crystalline formations develop within the concrete’s pores and capillary pathways. These formations help reduce concrete permeability and restrict water penetration.
Unlike conventional surface-applied waterproofing membranes, Xypex Admix becomes part of the concrete itself. Consequently, the waterproofing treatment does not depend solely on an external barrier.
This technology supports waterproof concrete construction for water storage tanks, wastewater treatment plants, and concrete reservoirs. However, proper construction joint detailing, waterstops, and penetration seals remain essential for watertight performance.
Waterproof from Within. Protect Concrete for the Long Term.


Key Benefits
Supports safe drinking water storage with appropriately certified products
Provides long-term resistance to water penetration
Helps withstand positive and negative hydrostatic pressure
Improves concrete durability and service life
Reduces maintenance and leakage-related repairs
Potable Water-Safe Crystalline Waterproofing
Xypex Crystalline Waterproofing Technology provides long-lasting protection for concrete structures used in potable water storage and distribution. Its crystalline technology reduces water penetration, improves concrete watertightness, and withstands hydrostatic pressure.
Suitable Xypex products with the required drinking-water contact certifications can be used in potable water tanks, concrete reservoirs, filtration basins, and municipal water storage facilities.
Contact AVA Concrete Protection for technical consultation, product recommendations, and certification guidance for potable water applications.
Waterproofing Solutions for Water-Retaining Structures

Concrete Water Tank Waterproofing
Protect concrete water tanks against leakage, moisture penetration, and hydrostatic pressure with Xypex Crystalline Waterproofing Technology. Designed for long-term durability, Xypex helps maintain watertight concrete in potable water storage, industrial tanks, and water-retaining structures.

Potable Water Reservoir Waterproofing
Xypex Crystalline Waterproofing Technology forms insoluble crystals within concrete to resist water penetration and hydrostatic pressure. Suitable for potable water applications where the required certifications are met, Xypex provides long-lasting protection for water tanks, reservoirs, filtration plants, swimming pools, and aquariums.

Water Treatment Plant Waterproofing
Protect concrete water treatment facilities against water penetration, leakage, and hydrostatic pressure with Xypex Crystalline Waterproofing Technology. Xypex enhances concrete durability and provides long-lasting waterproofing protection for filtration tanks, treatment basins, and water storage structures.

Concrete Reservoir Waterproofing
Protect concrete reservoirs against water leakage, seepage, and hydrostatic pressure with Xypex Crystalline Waterproofing Technology. Xypex helps improve concrete watertightness and long-term durability, providing reliable protection for water storage reservoirs, municipal water facilities, and large-scale water-retaining structures.

Wastewater Treatment Plants Waterproofing
Protect concrete wastewater treatment facilities against water penetration, leakage, and hydrostatic pressure with Xypex Crystalline Waterproofing Technology. Xypex enhances concrete durability and provides long-lasting waterproofing protection for aeration tanks, clarifiers, treatment basins, and wastewater containment structures.

Sewage Treatment Plant (STP) Waterproofing
Protect concrete sewage treatment facilities against water leakage, seepage, and hydrostatic pressure with Xypex Crystalline Waterproofing Technology. Xypex improves concrete watertightness and long-term durability, providing reliable waterproofing protection for sewage tanks, treatment basins, aeration chambers, and underground containment structures.
Why Use Integral Crystalline Waterproofing for Water Retaining Structures?
Conventional waterproofing systems often rely on coatings, membranes, or linings applied to the concrete surface. These systems may require maintenance or replacement depending on exposure and service conditions.



Reduces Concrete Permeability
Xypex crystalline technology forms insoluble crystalline structures within concrete pores and capillaries, helping restrict water penetration.

Supports Long-Term Concrete Durability
Reduced permeability can help limit the transport of water and certain dissolved substances associated with concrete deterioration.

Static Crack Self-Sealing Capability
Xypex reports the ability to seal static hairline cracks up to 0.5 mm under suitable conditions, subject to manufacturer specifications and project conditions.

Integrated During Concrete Batching
Xypex Admix C-Series is added during concrete production, reducing dependence on a separate surface-applied waterproofing barrier for the treated concrete.

Suitable for Infrastructure Construction
Crystalline waterproofing can be considered during the design and specification stages for large concrete tanks, reservoirs, and water treatment facilities.
Crystalline Admixture
Admix C-Series
Crystalline Admixture
Xypex Bio-San
Surface Applied Crystalline Waterproofing
Xypex Concentrate
Surface Applied Crystalline Waterproofing
Xypex Modified
Concrete Repair Products
Xypex Megamix Series
Concrete Repair Products
Xypex Patch’n Plug
Watch How Xypex Crystalline Waterproofing Works
Waterproofing Design Considerations for Water-Retaining Structures
Effective water tank and wastewater treatment plant waterproofing requires more than selecting an admixture.
Project teams should evaluate the concrete mix design, structural loading, water pressure, crack-width limits, exposure conditions, and construction sequence.

Construction Joints
Specify appropriate waterstops and approved joint treatments.
Pipe Penetrations
Detail sleeves, seals, and interfaces to prevent leakage.
Movement Joints
Use suitable flexible joint systems designed to accommodate movement.
Concrete Cracks
Evaluate crack width, movement, structural significance, and repair requirements.
Potable Water Applications
Verify the required drinking-water contact approvals and certifications for the specific product and installation.
Wastewater Exposure
Assess chemical exposure, including sulfates, acidic conditions, and biogenic sulfuric acid corrosion, and specify supplementary protection where required.
We support projects during the design, specification, tender, procurement, and construction stages. Our focus is helping teams identify suitable crystalline waterproofing materials and coordinate technical requirements before concrete placement.
Frequently Asked Questions
The appropriate system depends on the tank’s design, intended use, water pressure, concrete quality, and exposure conditions. Xypex integral crystalline waterproofing is an option for new concrete water tanks because it reduces permeability within the concrete itself. Joints and penetrations still require dedicated waterproofing details.
Yes. Xypex crystalline admixtures are used in water and wastewater infrastructure. However, aggressive chemical exposure must be assessed separately, and supplementary protective linings may be necessary in particularly corrosive environments.
Xypex products may be suitable for potable water applications, subject to the relevant product-specific drinking-water contact certifications and local project requirements. Confirm current approvals before specification.
No. Waterstops remain important at construction and movement joints. Integral crystalline waterproofing reduces permeability through the concrete matrix but does not replace proper joint design.
Xypex offers surface-applied crystalline waterproofing and repair products for certain leakage conditions. The appropriate repair method depends on the cause of leakage, concrete condition, crack movement, and hydrostatic pressure.
Still have questions? Check out our FAQ page or send us a message
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