Two-component sealant Z825

Building waterproofing materials

Two-component sealant Z825

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Z825 two-component waterproofing agent is a specialized polyurethane-based product designed for isolating and sealing structures against water and moisture infiltration into concrete, mortar, and building surfaces. Manufactured using modified polymers and advanced chemical compounds, this product undergoes a chemical reaction upon mixing its two main components, resulting in a fully waterproof, durable, and flexible layer. Z825 is widely used in construction waterproofing applications, particularly in areas such as swimming pools (including T90 pool sealing resin), water tanks, tunnels, restrooms, and basements, significantly enhancing the durability and lifespan of structures. Developed by ZarlooChem, this product is engineered with cutting-edge technology to meet the demands of both construction and industrial projects, offering a professional solution against moisture and dampness penetration.
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Two-component waterproofing agent Z825 is one of the most advanced products in the field of surface isolation and protection against moisture and water penetration. This product is designed based on modern chemical technologies and advanced formulation to deliver optimal and stable performance under various climatic, environmental, and structural conditions. As its name suggests, this material consists of two separate components that are combined at the time of application to provide the final waterproofing properties. The first component typically includes cement-based powder materials modified with special polymers, while the second component is a liquid containing active polymer resins. The combination of these two components results in a semi-fluid paste or applicable mortar that, once applied to the surface, forms a resistant layer against water, moisture, and vapor penetration. This product is particularly suitable for projects requiring waterproofing against both negative and positive water pressure. Z825 is designed to perform reliably under harsh conditions, including industrial, underground, and humid environments.
Properties and Effects of Z825 Two-Component Waterproofing Agent Z825 offers a wide range of properties that make it one of the most widely used and trusted waterproofing materials in construction. Key features include:
  • Excellent adhesion to various surfaces such as concrete, brick, cement, stone, and even some metals.
  • High elasticity, allowing flexibility against hairline cracks and surface volume changes, preventing layer failure.
  • Resistance to water pressure from both directions, crucial for applications like water tanks, tunnels, and pools.
  • UV resistance, ensuring no yellowing or performance degradation when exposed outdoors.
  • Vapor and moisture barrier, preventing mold, fungi, and moisture-related damage.
  • Extends the lifespan of structures and prevents premature deterioration in wet or water-exposed areas.

Applications of Z825 Waterproofing Agent Due to its superior technical features, Z825 is widely used in various construction, industrial, infrastructure, and civil engineering projects. Major applications include:
  • Waterproofing of potable water and wastewater concrete tanks, requiring a durable and non-toxic layer.
  • Isolation of tunnels and underground retaining walls exposed to negative groundwater pressure.
  • Used as a base waterproofing layer before tiling or finishing in swimming pools, jacuzzis, and aquatic areas.
  • Waterproofing rooftops, terraces, bathrooms, restrooms, and kitchens to prevent water infiltration to lower floors and adjacent walls.
  • Applied in industrial concrete structures like water channels, small dams, and chemical storage chambers due to its chemical and mechanical resistance.

Safety and Storage Guidelines for Z825 Proper safety and storage practices are essential when using Z825. During application, gloves, safety goggles, and masks should be worn to avoid direct contact with skin and eyes. In case of contact, rinse the affected area thoroughly with water and seek medical attention if irritation occurs. Both components must be stored in sealed containers, away from direct sunlight, freezing, and excessive heat. Ideal storage temperature is between 10°C and 30°C. Do not use damaged packaging. Components should only be mixed at the time of use, and leftover mixed material should not be stored, as the chemical reaction begins immediately and reduces technical properties. Work areas should be well-ventilated, and eating, drinking, or smoking during application should be avoided. ZarlooChem, the manufacturer, provides complete safety information, instructions, and technical data sheets with the packaging for informed usage.
Consumption Rate of Z825 Waterproofing Agent Consumption varies depending on project conditions, substrate type, application method, and surface porosity. On average, each layer requires 1.5 to 2 kg per square meter. For two-layer applications, this increases to approximately 3 to 4 kg per square meter.
Usage on Porous and Rough Surfaces Surfaces with higher roughness or porosity require more material to fill voids. Areas exposed to positive water pressure typically need thicker application, increasing consumption.
Usage on Large Surfaces In large-scale industrial projects, precise calculations are performed by supervising engineers or technical experts to estimate the required quantity. For small residential or sectional projects, standard packaging units can be used, and consumption estimated based on package instructions.
Important Note Overuse leads to material waste and increased costs, while underuse compromises waterproofing quality and reduces the protective layer’s lifespan. Consulting sales experts or the technical team of a reputable brand is a reliable way to determine exact consumption.
Why Z825 Is a Reliable Choice for Waterproofing Projects Z825’s unique chemical composition, strong waterproofing properties, high resistance to water pressure, and ease of application make it an ideal choice for isolating concrete and cement surfaces in construction and industrial projects. Its reliable performance contributes to longer structural lifespan, reduced maintenance costs, and prevention of water damage. Choosing Z825 from ZarlooChem is a smart decision for engineers, contractors, and clients seeking quality, durability, and assurance in waterproofing operations.
Standards for Z825 Waterproofing Agent ASTM D624 – ASTM D412

Physical and Chemical Properties of Z825 Two-Component Waterproofing Agent

Z825 features a unique blend of mineral materials, elastomeric polymers, and reinforcing additives, giving it distinctive physical and chemical characteristics.

Appearance Overview

The powder component of the product is light gray in color and consists of ultra-fine, uniform particles. These particles possess pozzolanic properties and react rapidly with the liquid component, initiating polymerization and hydration reactions that result in a solid, durable structure.

The liquid component is either transparent or milky white and contains acrylic polymers and modified resins. Once mixed, the resulting material has high viscosity and can be easily applied using a brush, roller, or trowel.

Chemical Properties

Chemically, Z825 demonstrates strong resistance to aggressive ions such as chloride, sulfate, and nitrate. It also withstands mild acidic and alkaline conditions without damaging the concrete structure. After application, the product maintains a neutral pH and is highly compatible with other building materials. Its surface water absorption rate is extremely low, and laboratory tests have shown its permeability under both positive and negative water pressure to be nearly zero.

Application Method of Z825 Two-Component Waterproofing Agent

To achieve optimal results when applying Z825, it is essential to follow the usage steps precisely. First, the substrate surface must be thoroughly cleaned and free of grease, dust, loose particles, and peeling paint. Deep cracks, holes, or uneven areas should be repaired using suitable repair mortar. After surface preparation, both components of Z825—typically two parts powder to one part liquid by weight—should be poured into a suitable container and mixed with a low-speed electric mixer for 3 to 5 minutes until a uniform, homogeneous, and bubble-free paste is obtained.

In hot weather conditions, the liquid container can be placed in the shade or cooled water to prevent accelerated reaction. The prepared mixture should be used within 30 to 45 minutes. Z825 is applied using a brush or roller with back-and-forth strokes, and if needed, a second layer can be applied after the first layer has dried. Allow approximately 6 to 8 hours for the first layer to set properly before applying the second.

If using a trowel, the mortar can be spread and smoothed over the surface. After completion, the surface must be protected for 24 hours from direct sunlight, rain, or standing water.

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