Market Background

Southeast Asia’s construction market operates under consistently high humidity, frequent rainfall, and long wet seasons. In residential and mixed-use buildings, interior wet areas such as bathrooms, washrooms, and utility spaces are continuously exposed to moisture, steam, and water splash. These conditions place higher demands on waterproofing materials, particularly in enclosed spaces where ventilation is limited and drying conditions are less controlled.

As construction quality expectations rise across the region, waterproof coatings are increasingly expected to deliver long-term moisture protection while remaining easy to apply and safe for indoor use. Traditional solvent-based systems and moisture-sensitive formulations often struggle to meet these requirements, leading to inconsistent curing, strong odors, and higher rework rates.

Customer & Application Scenario

The customer is a Southeast Asian manufacturer supplying waterproof coating products for residential housing developments and small commercial projects. The primary application areas include bathrooms, wet rooms, and other high-moisture interior spaces, where coatings are typically applied beneath tiles or finishing layers.

Typical job site conditions include:

• High ambient humidity throughout the year
• Enclosed interior spaces with limited airflow
• Manual application using rollers or brushes
• Demand for low-odor and installer-friendly products

The customer aimed to develop a waterproof coating solution that could ensure stable curing and reliable film formation under these conditions while improving application efficiency and user comfort.

Our Solution

To address these challenges, the customer adopted an STP-based waterproof coating system formulated using Risun STP polymer technology. The STP system enabled a moisture-curing mechanism well suited for humid environments while maintaining consistent application behavior in enclosed interior areas.

Key technical characteristics of the solution include:

• Polymer technology: STP (Silane-Terminated Polyether) polymer
• Environmental suitability: Optimized for high-humidity interior applications
• Curing mechanism: Moisture-curing, supporting reliable curing under ambient humidity
• Viscosity profile: Controlled flow for smooth application and uniform coverage
• VOC profile: VOC-free and solvent-free formulation design
• Application methods: Compatible with roller and brush application

The STP-based formulation allowed the coating to spread evenly across substrates, reducing the risk of pinholes and uneven thickness. At the same time, the solvent-free system improved job site conditions by minimizing odor and improving indoor air quality during application.

Customer Feedback

Following market introduction, the customer reported strong acceptance from both installers and distributors. Applicators noted improved ease of application and more consistent surface appearance, particularly in bathrooms where humidity levels remain high throughout the day. The low-odor formulation was highlighted as a key advantage in occupied residential environments.

From the manufacturer’s perspective, the STP-based system demonstrated stable formulation behavior and reduced sensitivity to environmental fluctuations. The simplified application process helped lower rework rates and improved overall installation efficiency.

Summary

This case demonstrates how STP-based waterproof coating solutions can effectively address the specific challenges of bathrooms and high-moisture interior areas in Southeast Asia. By leveraging Risun STP polymer technology, the customer successfully developed a waterproof coating that combines reliable curing, easy application, and long-term moisture protection. Such application-oriented STP solutions provide a practical and robust pathway for waterproofing manufacturers serving high-humidity markets.