Two‑Component Waterproofing Agent Z825

Building waterproofing materials

Two‑Component Waterproofing Agent Z825

ست 30 کیلویی

Z825 is a specialized polyurethane‑based product designed for the insulation and waterproofing of structures, aimed at preventing the penetration of water and moisture into concrete, mortar, and various building surfaces.
Sharing:

Two‑Component Waterproofing Agent Z825

Overview

Two‑Component Waterproofing Agent Z825 is one of the most advanced products in the field of surface insulation and protection against the penetration of moisture and water. Designed using modern chemical technology and advanced formulation, it delivers reliable and consistent performance under diverse climatic, environmental, and structural conditions. As the name suggests, the material consists of two separate components that are combined at the time of application to achieve its full waterproofing properties.

The first component typically consists of cement‑based powder modified with special polymers, while the second component is a polymer resin‑rich liquid. When mixed, they form a semi‑fluid paste or applicable mortar, which, once applied, creates a resistant layer against water, moisture, and vapor penetration. Z825 is especially well‑suited for projects requiring waterproofing against both positive and negative water pressure, and it is engineered to maintain reliable performance in harsh environments, including industrial, underground, and humid conditions.


Properties & Effects

Z825 offers a broad range of properties, making it one of the most versatile and reliable waterproofing materials for construction:

  • Excellent adhesion to various surfaces, including concrete, brick, cement, stone, and certain metals.
  • High elasticity, allowing the coating to bridge hairline cracks and accommodate substrate volume changes without failure.
  • Bi‑directional water resistance, withstanding both positive and negative hydrostatic pressures.
  • UV resistance, preventing discoloration or performance reduction when exposed to sunlight.
  • Vapor and moisture barrier capabilities, preventing mold, fungus, and moisture‑related damage.
  • Prolonged structure lifespan, reducing early‑stage deterioration in humid or water‑exposed environments.

Applications

Thanks to its superior technical properties, Z825 is widely used in a range of construction, industrial, infrastructure, and civil engineering projects:

  • Waterproofing of potable water and wastewater concrete tanks.
  • Tunnels and underground retaining walls under negative groundwater pressure.
  • Swimming pools, jacuzzis, and water recreation areas — applied as a waterproof layer before tiling or cladding.
  • Roofs, terraces, bathrooms, kitchens, and wet service areas to prevent water migration to adjacent areas.
  • Industrial concrete structures such as water channels, small dams, and chemical containment units.

Safety & Storage

  • Wear gloves, safety goggles, and a mask during application to avoid direct contact with skin and eyes.
  • In case of contact, rinse the affected area thoroughly with water; seek medical advice if irritation occurs.
  • Store both components in sealed containers, away from direct sunlight, freezing, and extreme heat.
  • Recommended storage temperature: +10°C to +30°C.
  • Do not use if packaging is damaged.
  • Only mix components at the time of use — once mixed, the chemical reaction begins, and leftover material will lose efficiency.
  • Ensure adequate ventilation in the application area; avoid eating, drinking, or smoking during application.

ZORLU Chemical provides complete safety guidelines, instructions, and the technical data sheet (TDS) with each package.


Dosage & Consumption

  • Average consumption per layer: 1.5–2.0 kg/m².
  • For two layers: 3.0–4.0 kg/m² total.
  • Rough or highly porous surfaces require higher consumption due to increased material absorption.
  • Surfaces under positive water pressure generally need thicker application, thus increasing material usage.

Large‑Scale Applications: For industrial or large‑area projects, precise calculations should be performed by supervising engineers or technical specialists.

Small‑Scale Applications: Use standard packaging guidelines to estimate required quantities.

Over‑application leads to material waste and higher costs, while under‑application reduces waterproofing quality and durability. Consultation with the brand’s technical or sales team is recommended for accurate estimation.


Why Z825 is a Reliable Choice

With its unique chemical composition, exceptional waterproofing strength, high resistance to both positive and negative water pressure, and ease of application, Z825 is an ideal solution for isolating concrete and cementitious surfaces in both building and industrial projects. Its reliable performance can significantly extend structure lifespan, reduce maintenance costs, and prevent water damage. Choosing Z825 from ZORLU Chemical ensures quality, durability, and peace of mind for engineers, contractors, and project owners alike.


Standards

  • ASTM D624
  • ASTM D412

Physical and Chemical Properties of Two‑Component Waterproofing Agent Z825

Z825 is formulated with a special combination of minerals, elastomeric polymers, and reinforcing additives, resulting in unique physical and chemical characteristics.

Appearance

  • Powder Component: Light grey color with very fine and uniform particles. The pozzolanic nature of these particles enables rapid reaction with the liquid component, producing a strong matrix through polymerization and hydration mechanisms.
  • Liquid Component: Transparent or milky white, containing acrylic polymers and modified resins. When the two components are combined, they form a high‑viscosity material that can be easily applied with a brush, roller, or trowel.

Chemical Properties

  • Resistant to aggressive ions such as chlorides, sulfates, and nitrates.
  • Maintains stability against mild acids and alkalis without damaging the concrete structure.
  • Achieves a near‑neutral pH after curing, ensuring high compatibility with other construction materials.
  • Very low surface water absorption.
  • Laboratory testing has shown virtually zero permeability under both positive and negative water pressure conditions.

Application Method for Two‑Component Waterproofing Agent Z825

To achieve the best results when applying Z825, it is essential to follow the application steps precisely:

  1. Surface Preparation

    • Ensure the substrate is completely clean, free from grease, dust, loose particles, and flaking paint.
    • Deep cracks, holes, or uneven surfaces must be repaired using a suitable repair mortar before application.
  2. Mixing

    • Combine both Z825 components according to the manufacturer’s specified weight ratio (typically two parts powder to one part liquid) in a suitable container.
    • Mix for 3–5 minutes using a low‑speed electric mixer until a uniform, homogeneous, and bubble‑free paste is obtained.
  3. Temperature Considerations

    • In hot weather, the liquid component container can be kept in the shade or cooled in water to slow the reaction rate.
  4. Application Time

    • The prepared material should be applied within 30–45 minutes.
  5. Application Process

    • Apply Z825 using a brush or roller in back‑and‑forth strokes.
    • If a second coat is needed, wait 6–8 hours after the first coat has dried to ensure proper curing.
  6. Alternative Tool Application

    • When applying with a trowel, spread and smooth the material evenly over the surface.
  7. Protection During Curing

    • After application, protect the surface for at least 24 hours from direct sunlight, rain, or standing water.