In the field of building waterproofing and engineering maintenance, water-soluble polyurethane plugging agents are gradually becoming the new favorite of the industry with their unique performance and environmental advantages. Whether it is basement seepage, tunnel cracks or roof leaks, this material can provide efficient and lasting solutions. This article will deeply analyze its basic principles, core parameters and application scenarios to help you fully understand this revolutionary material.

 

Why can water-soluble polyurethane plug leaks efficiently?

Water-soluble polyurethane plugging agent is a polymer material with water as the dispersion medium. Its plugging principle can be divided into three steps:

 

Penetration and diffusion: After the liquid plugging agent is injected into the crack, it quickly penetrates into the fine pores, even into the 0.1mm crack.

 

Reaction with water: The active ingredients in the material undergo polymerization reaction after contact with water to generate an elastic gel with an expansion rate of 200%-300%, which can tightly fill the cracks.

 

Elastic sealing: After curing, a highly elastic and highly adhesive waterproof layer is formed to adapt to structural deformation (such as thermal expansion and contraction) and prevent leakage for a long time.

 

Technical highlights:

 

Environmentally friendly and non-toxic: no solvent, VOC content close to zero, safe construction.

 

Quick response: adjustable gel time (3 minutes to 1 hour) to meet the needs of different working conditions.

 

Application scenarios: Where is water-soluble polyurethane plugging agent needed?

Underground engineering

 

Basement seepage: repair wall cracks and joints leakage to resist groundwater pressure.

 

Underground garage: solve the problems of ground moisture and structural cracks.

 

Municipal and transportation facilities

 

Tunnel plugging: repair lining cracks to prevent water seepage from causing structural corrosion.

 

Bridge joint sealing: adapt to expansion and contraction deformation under dynamic loads.

 

Industrial and civil buildings

 

Roof waterproofing: quickly repair roof cracks and resist rain erosion.

 

Pipeline well plugging: seal the leakage points around the water supply and drainage pipelines.

 

Water conservancy project

 

Dam crack repair: long-term waterproofing to ensure the safety of water conservancy facilities.

 

Practical application effect

Case 1: Leakage control of a subway tunnel

 

Problem: Cracks in the tunnel lining lead to serious water seepage in the rainy season.

 

Solution: Inject water-soluble polyurethane plugging agent, and set the gel time to 15 minutes.

 

Effect: Leakage is completed within 24 hours, and there is no recurrence in 3 years.

 

Case 2: Waterproof renovation of the basement in an old community

 

Problem: There are many cracks on the basement wall, and the depth of water accumulation in the rainy season reaches 10cm.

 

Solution: Use low-viscosity water-soluble polyurethane to penetrate and repair fine cracks.

 

Effect: Dry and leak-free after construction, highly praised by residents.

 

Why choose water-soluble polyurethane plugging agent？

Efficient and convenient: single-component material, no mixing, direct grouting construction.

 

Durable: The elastic sealing layer can resist structural deformation and has a lifespan of more than 10 years.

 

Environmentally friendly and safe: no toxic volatiles, suitable for use in confined spaces.

 

 

In tunnel engineering, leakage problems have always been a technical problem that plagues the construction team. The modified epoxy grouting fluid launched by Nanjing KEZU provides an efficient and lasting solution for tunnel leakage repair with its high-pressure grouting technology and 0.02mm micro-crack penetration ability. This technology not only breaks through the limitations of traditional repair methods, but also demonstrates excellent performance advantages through strict durability verification.

 

Analysis of high-pressure grouting technology

 

1. Technical principle

Nanjing KEZU's modified epoxy grouting fluid adopts high-pressure grouting technology to inject slurry into the depth of the crack through special equipment. The slurry penetrates rapidly under high pressure, fills micro-cracks and forms a solid waterproof layer.

This technology can handle cracks as low as 0.02mm in width, far exceeding the penetration limit of traditional grouting materials.

 

2. Construction process

Crack positioning: Use professional equipment to detect the location and depth of the crack.

Grouting preparation: Install the high-pressure grouting needle to ensure a tight connection with the crack.

High-pressure grouting: Inject the modified epoxy grouting liquid into the crack with a pressure of up to 70MPa.

Curing inspection: After the slurry is cured, conduct a waterproof performance test to ensure no leakage.

 

0.02mm micro-crack penetration: a breakthrough in technical barriers

1. Low viscosity formula

The initial viscosity of the modified epoxy grouting liquid is ≤190MPa·s, which enables it to easily penetrate deep into the micro-cracks to ensure full sealing.

Laboratory tests show that the penetration rate of the slurry in 0.02mm cracks is as high as 95%, far exceeding the industry average.

 

2. Fast curing and high strength

The slurry cures quickly after contact with moisture, and the initial setting time can be controlled between 40 minutes and 2 hours.

After full curing, the compressive strength is ≥70MPa and the tensile strength is ≥15MPa, ensuring the structural strength and waterproof performance after repair.

 

Durability verification: guarantee of long-term performance

1. Laboratory test

In the durability test simulating the tunnel environment, the modified epoxy grouting fluid still had no cracking or falling off after 1,000 freeze-thaw cycles.

The anti-seepage pressure is ≥1.2MPa, far exceeding the industry standard, ensuring long-term waterproofing effect.

 

2. Actual project verification

In a subway tunnel project in Nanjing, KEZU modified epoxy grouting fluid successfully repaired multiple leakage points. After two years of follow-up monitoring, no leakage problems occurred in the repaired area, proving its excellent durability.

 

Technical advantages and market competitiveness

1. Efficient construction

High-pressure grouting technology greatly shortens the construction time. It only takes 1-2 hours to repair a single crack, which significantly improves the project efficiency.

2. Cost-effectiveness

Compared with traditional repair methods, KEZU modified epoxy grouting fluid reduces material waste and labor costs, and reduces the overall construction cost by 15%-20%.

3. Environmental protection and safety

The grout adopts an environmentally friendly formula, is non-toxic and odorless, and no harmful gas is emitted during the construction process, which meets the green building standards.

 

Nanjing Kezu's modified epoxy grouting liquid has redefined the standard of tunnel leakage repair with its high-pressure grouting technology, 0.02mm micro-crack penetration ability and excellent durability. Whether in terms of technical performance or economic benefits, this solution has demonstrated strong market competitiveness. Choosing KEZU is not only choosing a grouting material, but also choosing an efficient and lasting engineering future.

“Water-based paints can’t handle heavy wear and tear.”

“They’ll rust faster than traditional options.”

“The color fades after a few months.”

 

If these myths sound familiar, you’re not alone. Many still distrust water-based metallic paints, assuming they’re the “diet soda” of coatings—lighter but less satisfying. Let’s crack these misconceptions open.

 

Myth 1: “They’re Less Durable”

Reality: Modern water-based metallics are fortified with advanced resins and corrosion inhibitors. For example, automotive brands like Tesla and BMW use them for exterior trims because they withstand UV rays, salt spray, and extreme temperatures better than many solvent-based rivals.

 

Myth 2: “They Don’t Stick to Metal”

Reality: Proper surface prep (cleaning, priming) ensures adhesion. Brands like Rust-Oleum and Sherwin-Williams offer water-based primers specifically designed for metals, creating bonds that outlast older formulas.

 

Myth 3: “Limited Color Options”

Reality: From rose gold to gunmetal gray, today’s water-based metallics offer richer pigmentation. Nano-particle technology allows finer metallic flakes, giving deeper, more reflective finishes.

 

Case in Point

A yacht manufacturer in Florida switched to water-based paints for hulls and decks. After two years in salty ocean air, their client reported zero corrosion or fading—saving thousands in repaint costs.

 

Don’t Let Myths Cost You

Water-based metallic paints have evolved. Isn’t it time your projects did too?

Breathe new life into old furniture with water-based metallic paints! These user-friendly coatings are a DIYer’s dream:

 

• Smooth Application: No brush marks or streaks—ideal for intricate designs.

• Non-Toxic Formula: Safe for indoor projects, even without ventilation.

• Versatile Finishes: Mix colors or layer with waterproof varnishes for custom effects.

 

Pro tip: Apply a waterproof topcoat to guard against spills and humidity. From vintage dressers to modern shelves, create showstopping pieces that withstand daily wear.

In the 51,500㎡ factory renovation project of Hainan Zhongyu Aquatic Products, Nanjing KEZU successfully solved the roof rust and leakage problems that had long troubled customers with its innovative rust converter and high-elastic polyurethane waterproof coating. This project not only significantly improved the waterproof performance of the factory, but also saved customers 20% of the cost, becoming a benchmark case in the field of industrial waterproofing.

 

Customer pain point: the dual challenge of rust and leakage

The factory of Hainan Zhongyu Aquatic Products was built in the coastal area and was exposed to high humidity and high salt environment for a long time, resulting in severe rust on the color steel tile roof and leakage in many places. This not only affected the production environment of the factory, but also increased maintenance costs. The customer had tried a variety of traditional waterproofing solutions, but the results were not ideal, and an efficient and lasting solution was urgently needed.

 

KEZU solution: rust converter + waterproof coating

1. Rust converter: fast rust removal, long-term protection

Nanjing Kezu's rust converter can be directly sprayed on the rusted surface to convert rust into a dense black paint film as a solid base for the waterproof layer.

In the Hainan project, the construction team completed the rust treatment in just 3 days without manual polishing, which greatly shortened the construction period.

 

2. High-elastic polyurethane waterproof coating: elastic crack resistance, long-lasting waterproof

On the base surface treated with the rust converter, the construction team sprayed two layers of KEZU high-elastic polyurethane waterproof coating. The elongation of the coating is ≥300%, which can adapt to the thermal expansion and contraction of the color steel tile and effectively prevent cracking.

The environmentally friendly water-based formula of the coating is non-toxic and odorless, and the construction process does not cause any impact on the production of the factory.

 

Construction process and efficiency improvement

1.Surface treatment: Use a wire brush to clean the floating rust and dust to ensure that the base surface is clean.

2. Rust converter spraying: Spray the rust converter evenly and wait for 1 hour for the surface to dry.

3. Waterproof coating construction: spray two layers of high-elastic polyurethane waterproof coating, 24 hours apart.

4. Quality inspection: After the coating is completely cured, conduct a waterproof performance test to ensure no leakage.

 

The entire project took only 7 days, which shortened the construction period by 30% compared with the traditional solution, while reducing labor and material costs, saving customers 20% of the total cost.

 

Project effect comparison

Before the renovation: the roof was severely rusted, leaked in many places, the production environment was affected, and the annual maintenance cost was as high as 500,000 yuan.

After the renovation: the roof is brand new, without rust or leakage, and the service life is expected to be extended by more than 10 years, and the annual maintenance cost is reduced to 100,000 yuan.

 

Customer feedback:

"Nanjing Kezu's rust converter and waterproof coating completely solved our roof problem. The construction speed is fast, the effect is significant, and most importantly, it saves a lot of costs. We are very satisfied!"--Project Manager of Hainan Zhongyu Aquatic Products

 

The factory waterproofing renovation project of Hainan Zhongyu Aquatic Products fully demonstrated Nanjing Kezu's technical strength and solution capabilities in the field of industrial waterproofing. The combined application of rust conversion agent and high elastic polyurethane waterproof coating** not only solved the customer's pain points, but also achieved significant cost savings and efficiency improvements. This successful case provides valuable experience for similar projects and once again proves the excellent performance of KEZU products.

Nanjing KEZU's Multi-function High Elastic PU Waterproof Coating is a revolutionary product designed to address the challenges of building waterproofing. This coating is formulated with environmentally friendly high-molecular polymers, making it non-toxic and odorless, which is ideal for a wide range of applications, including roofs, basements, tunnels, and more.

 

One of the standout features of this coating is its high elasticity, with an elongation rate of over 300%. This allows the coating to adapt to substrate deformations, such as thermal expansion and contraction, without cracking. This flexibility ensures long-term durability, even in harsh weather conditions. Additionally, the coating offers excellent anti-aging properties, maintaining its performance and appearance even after prolonged exposure to UV rays and extreme temperatures.

The ease of application is another significant advantage. The coating can be applied by scraping, spraying, or rolling, making it suitable for both large-scale projects and small repairs. It adheres strongly to various substrates, including cement, metal, and stone, without requiring complex pre-treatment. This makes it a versatile solution for different construction needs.

 

Moreover, the multi-functional nature of this coating allows it to serve as both a waterproof layer and a protective barrier. It is particularly effective in preventing water leakage in areas prone to cracks, such as roofs and basements. The coating’s ability to "stop leaks with one brush" makes it a reliable choice for contractors and homeowners alike.

 

In summary, Nanjing KEZU's High Elastic PU Waterproof Coating is a game-changer in the construction industry, offering a combination of eco-friendliness, high elasticity, durability, and ease of use. Whether you're dealing with a small crack or a large-scale waterproofing project, this coating provides a long-lasting and effective solution.

For factory managers, every dollar counts. But when equipment, machinery, or structural metals start corroding, the bills pile up fast: repainting costs, downtime, and even product recalls from contaminated goods. Traditional solvent-based paints might seem cheaper upfront, but their hidden costs are brutal.

 

The Hidden Expenses of Solvent-Based Paints

 

Health Compliance: Installing ventilation systems to meet OSHA standards can cost $10,000+ per workspace.

 

Waste Disposal: Solvents are classified as hazardous waste, requiring expensive disposal protocols.

 

Slow Production: Longer drying times mean slower assembly lines.

 

Enter Water-Based Metallic Paints

Switching isn’t just “greenwashing”—it’s a financial game-changer:

 

Cut Disposal Costs by 70%: Water-based waste isn’t hazardous, slashing disposal fees.

 

Reduce Downtime: Faster drying = more batches per day.

 

Avoid Fines: Stay compliant with global VOC regulations effortlessly.

 

Real Savings, Real Results

A Midwest appliance factory switched to water-based metallics for their steel components. Result? Yearly savings of $52,000 in waste management and a 15% boost in production speed. Even their energy bills dropped—no need for massive exhaust fans!

 

The Takeaway

Water-based metallic paints aren’t just a “nice-to-have.” They’re a strategic tool to protect your budget and your products.

Cracks in factory floors, warehouse slabs, or parking garages aren’t just tripping hazards—they’re profit killers. Downtime, worker injuries, and equipment damage from uneven surfaces can cripple operations. But replacing entire concrete slabs is expensive, time-consuming, and often unrealistic for busy facilities.

 

Grout injection offers a smarter alternative. By injecting high-strength materials under floors, businesses can:

 

Level surfaces in hours, not weeks.

 

Prevent water infiltration that rusts machinery.

 

Avoid shutdowns: Most injections cure within 24 hours.

 

Case Study: A logistics company in Florida faced constant forklift breakdowns due to uneven flooring. After grout injection leveled their 10,000 sq ft warehouse, productivity jumped 20%, and repair costs dropped by 65%.

 

Why Industries Love Grout Injection:

 

Precision: Sensors and robotics ensure injections target exact problem areas.

 

Versatility: Works on concrete, asphalt, and even historic buildings.

 

Safety Compliance: Meets OSHA standards for workplace flooring.

 

Ignoring floor damage is a liability. Grout injection isn’t just a repair—it’s an investment in smoother, safer, and more profitable operations.

Are you tired of discovering damp patches on your walls or watching cracks in your foundation grow wider every year? Structural leaks and weak foundations aren’t just eyesores—they’re financial time bombs. Traditional repair methods like excavation or wall replacement can drain your savings and disrupt your life for weeks. But what if there’s a faster, cheaper, and minimally invasive solution?

 

Enter grout injection, the unsung hero of modern structural repair. This innovative technique uses specialized polymers or cement-based materials to seal cracks, stabilize soil, and waterproof structures—all without tearing down walls or digging up your backyard. Imagine fixing a leaking basement wall in hours instead of days, or stabilizing a sinking foundation without heavy machinery. Grout injection isn’t just a "quick fix"; it’s a long-term solution that addresses the root cause of damage.

 

Why Grout Injection Wins Hearts (and Wallets):

 

Cost-effective: Up to 50% cheaper than traditional methods.

 

Speed: Most projects wrap up in a single day.

 

Durability: Resists water, chemicals, and soil shifts.

 

Eco-friendly: Minimal waste and no landscape destruction.

 

Still skeptical? Ask homeowners like Sarah from Texas, who saved $12,000 by opting for grout injection to repair her home’s sinking foundation. Or consider commercial property managers who use it to prevent costly downtime in warehouses.

 

Don’t let leaks and cracks dictate your budget. Grout injection turns nightmares into manageable fixes.

Nanjing KEZU's Polyurethane Leak-Stopping Agent series is a highly effective solution for repairing cracks and preventing water leakage in buildings. Available in both water-soluble and oil-soluble formulations, these products are designed to address a wide range of leakage issues, from small cracks in residential buildings to large-scale structural repairs in industrial settings.

 

The water-soluble polyurethane leak-stopping agent is particularly effective for sealing cracks in concrete structures. When it comes into contact with water, it rapidly expands and forms a gel-like substance that fills the cracks and stops water leakage. This product is ideal for use in basements, tunnels, and other underground structures where water infiltration is a common problem.

On the other hand, the oil-soluble polyurethane leak-stopping agent is designed for more demanding applications, such as foundation reinforcement and emergency repairs. It has a high expansion rate (up to 1000%) and can withstand high pressure, making it suitable for sealing large cracks and gaps.

 

One of the key features of these leak-stopping agents is their high permeability. They can penetrate into micro-cracks as small as 0.02mm, ensuring a thorough and long-lasting seal. This makes them highly effective in preventing water leakage, even in hard-to-reach areas.

The ease of use is another significant advantage. Both water-soluble and oil-soluble leak-stopping agents can be applied using standard grouting equipment. The single-liquid formulation simplifies the construction process, reducing the need for complex mixing or preparation.

Additionally, these products are highly durable and resistant to environmental factors such as temperature fluctuations and chemical exposure. They are suitable for use in a variety of settings, including residential, commercial, and industrial buildings.

 

In summary, Nanjing KEZU's Polyurethane Leak-Stopping Agents are a reliable, efficient, and versatile solution for crack repair and water leakage prevention. Their ability to quickly seal cracks, combined with their durability and ease of use, makes them an essential tool for construction professionals.