Case study of Coromandel International Ltd – High Performance PU Elastomeric Waterproofing

Coromandel International Limited Project Overview:

Coromandel International Limited recognized the need to enhance its factory’s waterproofing and sealing capabilities in response to the region’s climatic demands.

The latter’s reputation for delivering innovative and reliable construction chemical solutions drove the decision to partner with Sunanda Global.

The project focused on applying a polyurethane base primer and a single-component liquid-applied polyurethane waterproofing and sealing membrane to various surfaces within the factory premises.

Challenges and Solutions of Coromandel International Limited Project:

Coromandel International Limited’s factories faced environmental influences that demanded a robust waterproofing system.

Sunanda Global’s high-performance polyurethane solutions offered a tailored response to the project’s unique requirements.

Surface Preparation and Priming:

Adhering to a meticulous surface preparation process, applying polyurethane base primer became a crucial first step.

This primer, specifically designed for optimal adhesion, was applied to address porous substrates, ensuring a solid foundation for the subsequent waterproofing layers.

The primer not only enhanced adhesion but also acted as a protective barrier against potential issues such as pinholes and blisters caused by environmental conditions.

Application Process:

The application process emphasized efficiency, simplicity, and reduced labour costs.

The liquid-applied polyurethane elastomeric membrane offered versatility in application, suitable for horizontal and vertical surfaces. The two-coat application ensured a seamless and durable waterproofing layer.

The first coat of the liquid-applied polyurethane membrane applied at a recommended rate, formed a robust foundation on all surfaces.

The unique composition of the membrane allowed for an optimal curing period, ensuring a tack-free surface before the application of the second coat.

This second coat, applied at right angles to the first, not only added an extra layer of protection but also facilitated the adhesion of subsequent protective materials.

Quality Assurance for Coromandel International Ltd project:

To guarantee the effectiveness of the waterproofing system, the project team implemented stringent quality assurance measures.

The cured membrane underwent a thorough testing process over a minimum period, reinforcing its soundness and reliability.

They employed ponding, an effective testing method to validate the membrane’s performance under various conditions.

Protective Screed:

Following the successful testing phase, the team applied a protective cement-sand screed to shield the cured membrane.

This additional layer provided further protection and prepared the surface for subsequent activities such as tiling or other surfacing materials.

The attention to detail in the application process showcased Sunanda Global’s commitment to delivering a comprehensive and enduring solution.


The collaboration between Sunanda Global and Coromandel International Limited exemplifies the successful integration of high-performance liquid-applied polyurethane elastomeric membrane solutions.

The project’s emphasis on surface preparation, efficient application, and quality assurance underscores the reliability and effectiveness of Sunanda Global’s waterproofing systems.

As a result, Coromandel International Limited’s factories in Hyderabad, Telangana, now stand resilient against the region’s challenging environmental conditions, ensuring the longevity and sustainability of critical infrastructure.

By choosing Sunanda Global’s advanced waterproofing solutions, Coromandel International Limited has not only fortified its facilities but has also set a benchmark for the seamless integration of cutting-edge construction chemicals in the pursuit of infrastructure resilience.

This case study is a testament to the transformative impact of high-performance liquid-applied polyurethane elastomeric membrane systems in safeguarding critical assets against the elements.