polyurethane waterproof coating

In the field of building waterproofing, high-elastic polyurethane waterproof coatings have become industry benchmark products with their excellent chemical properties and construction convenience. The high-elastic polyurethane waterproof coating launched by Nanjing KEZU not only has ultra-high elasticity with **elongation ≥300%**, but also maintains stable performance in a low temperature environment of -35℃**. At the same time, it adopts **environmentally friendly water-based formula**, providing modern buildings with efficient and sustainable waterproof solutions.   Chemical performance analysis   1. Ultra-high elasticity and crack resistance Laboratory test data show that the tensile strength of KEZU high-elastic polyurethane waterproof coating is ≥1.5MPa and the elongation at break is ≥300%. This means that even when the base layer undergoes large deformation (such as thermal expansion and contraction or structural settlement), the coating can remain intact and effectively prevent cracking and leakage. Compared with traditional waterproof materials, its elastic performance has been improved by about 40%, which is particularly suitable for scenes such as roofs, basements and tunnels that are prone to cracks.   2. Low temperature resistance In a low temperature environment of -35℃, KEZU high-elastic polyurethane waterproof coating can still maintain flexibility and no brittle cracking. This feature makes it an ideal choice for building waterproofing in cold areas. Laboratory simulation tests show that the coating has no cracking or falling off after 1,000 cycles under extreme temperature cycles (-35℃ to 80℃), showing excellent durability.   3. Environmentally friendly water-based formula The coating adopts a water-based formula with 0 VOC content, is non-toxic and odorless, and meets global environmental standards. Compared with traditional solvent-based coatings, it reduces harmful gas emissions and provides a safer environment for construction workers and residents. Laboratory tests show that its heavy metal content is far lower than the industry standard, and it is suitable for places such as residences, schools and hospitals with extremely high environmental protection requirements.   Construction advantages   1. Convenient construction KEZU high-elastic polyurethane waterproof coating supports multiple construction methods such as scraping, spraying and rolling to meet the needs of different scenarios. It has good fluidity and can easily cover complex surfaces, such as pipe roots, corners and other detailed parts. No complex pretreatment is required during the construction process, and it can be directly applied by brushing, which greatly shortens the construction period.   2. Fast drying and high strength The surface drying time of the coating only takes 4 hours, and the actual drying time is 24 hours (under normal temperature conditions), which significantly improves the construction efficiency. Laboratory data shows that after the coating is fully cured, the bonding strength with concrete, metal and other substrates is ≥1.2MPa, ensuring long-term waterproof effect.   3. Multifunctional application The coating is not only suitable for building roofs, basements and bridges, but also for waterproof protection of special substrates such as metal structures and color steel tiles. In the cooperation project between KEZU and Jiangsu Jinfeng Steel, the coating was successfully applied to the roof of a 23,500㎡ factory building. After two years of follow-up monitoring, no leakage problems were found.   Laboratory data support Tensile properties: elongation at break ≥300%, tensile strength ≥1.5MPa. Low temperature performance: no cracks at -35℃, no abnormalities after 1000 cycles from -35℃ to 80℃. Environmental performance: VOC content is 0, and heavy metal content is less than 0.01mg/m³.   Nanjing Kezu's high-elastic polyurethane waterproof coating has redefined the standard of building waterproofing with its ultra-high elasticity, low temperature resistance and environmentally friendly water-based formula. Whether it is durability under extreme climatic conditions, or construction convenience and environmental protection, this product has demonstrated excellent comprehensive performance. Choosing KEZU is not only choosing a waterproof coating, but also choosing a sustainable building future.

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.