Analysis of the Chemical Properties and Construction Advantages of High-Elastic Polyurethane Waterproof Coatings

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.