Petra Oil’s CMS-2 is a specially formulated cationic medium setting bitumen emulsion ideal for use in cold mix asphalt production, patching, and maintenance applications where extended workability is needed before setting occurs. The term CMS stands for Cationic Medium Setting, and this Grade 2 variant is designed for projects requiring strong adhesion to aggregates, prolonged mixing time, and dependable performance in varied climates.

CMS-2 is engineered to deliver excellent coating and binding properties, making it suitable for coarse and graded aggregate mixes in both site-mixed and plant-mixed operations. Its medium setting characteristic offers a perfect balance: long enough to ensure proper aggregate coating and mixing, but fast enough to allow for timely compaction and traffic reopening.

This emulsion performs well on damp or moisture-prone aggregates, thanks to its cationic emulsifier system, which enables electrochemical bonding with negatively charged surfaces. As a cold-applied product, CMS-2 improves safety on-site, eliminates the need for heating, and reduces energy consumption—making it highly cost-effective and environmentally friendly.

It is widely used in cold mix binder layers, surface patching, and rural road rehabilitation, particularly in regions where heating equipment is not feasible or where weather conditions require reliable curing.

Key Specifications:

• Type: Cationic Bitumen Emulsion (CMS-2)
• Setting Time: Medium Setting
• Standard Compliance: IS 8887:2018
• Application Temperature: Ambient (Cold Application)

Main Applications of CMS-2:

• Cold Mix Asphalt Production: Perfect for low-volume roads and rural projects.
• Patching & Maintenance: Effective for deeper pothole filling and surface correction.
• Base Layer Construction: Ensures stable foundation and interlayer bonding.
• Road Rehabilitation: Supports cost-effective repair and strengthening efforts.

Benefits of CMS-2:

• Optimized Workability: Extended setting time ensures thorough mixing and placement.
• Strong Adhesion: Bonds well even with moist, dusty, or aged aggregates.
• Safe Cold Application: No heating required, improving safety and reducing emissions.
• Improved Surface Performance: Delivers a flexible, weather-resistant binder layer.
• Efficient & Sustainable: Reduces energy costs while maintaining long-term performance.