Special High Float Anionic Medium Setting Emulsion for Advanced Road Applications
Black Rock Bitumen supplies HFMS-2S bitumen emulsion, a special-grade high float anionic medium-setting emulsion engineered for enhanced workability, extended mixing time, and superior coating performance in demanding applications.
Manufactured to meet ASTM D977 / ASTM D244 standards, HFMS-2S is widely used in cold mix asphalt, pavement recycling, patch repairs, and specialized road construction projects.
What is HFMS-2S Bitumen Emulsion?
HFMS-2S (High Float Medium Setting – Grade 2 Special) is an anionic bitumen emulsion designed to deliver optimized viscosity, improved cohesion, and extended working time compared to standard HFMS-2.
Key characteristics:
- High float property → creates a thick, flexible, gel-like bitumen film
- Medium-setting behavior → allows proper mixing and placement
- “S” grade (Special Performance) → enhanced workability and controlled breaking
- Negative charge (anionic) → best suited for calcareous aggregates
HFMS-2S is specifically developed for projects requiring precision, longer placement time, and superior coating quality.
Unlike standard HFMS-2:
- Provides longer working time for mixing and compaction
- Offers better control in complex site conditions
- Improves coating uniformity and durability
It is especially useful where standard emulsions set too quickly or lack flexibility during application.



