Black Rock Bitumen supplies QS-1H bitumen emulsion, a quick-setting anionic emulsion with high-viscosity (hard residue) designed for fast bonding, strong adhesion, and rapid road maintenance operations.
Manufactured to meet ASTM D977 / ASTM D244 standards, QS-1H is widely used in tack coat, fog seal, patching, and surface sealing applications where quick setting is essential.
QS-1H (Quick Setting – Grade 1 Hard) is an anionic bitumen emulsion designed to break rapidly upon contact with aggregates, forming a strong adhesive bond between pavement layers.
Key characteristics:
Quick-setting emulsions are specifically used for surface applications, not mixing, because they set too fast during mixing processes
QS-1H is commonly used where:
We deliver bitumen in versatile, secure options: economical Jumbo Bags, robust steel Drums, or high-volume Bulk Containers (Bitutainers/Bituboxes).
QS-1h is a cationic slow-setting, high-viscosity bitumen emulsion offering excellent adhesion, strong residual binder, and extended workability for slurry, micro-surfacing, and fine aggregate applications.
QS-1h is a cationic slow-setting, high-viscosity bitumen emulsion designed to provide superior bonding and longer working time.
It is widely used in:
QS-1h has higher viscosity and stronger residual binder, improving mix stability and durability in demanding applications.
Excellent adhesion and cohesion
Extended workability time
Strong residual binder
Suitable for cold application
Store QS-1h in clean, insulated tanks, maintain temperatures above 5°C, avoid contamination, and gently circulate if stored for long periods.
Performance depends on:
Anionic emulsions break mainly through water evaporation, making environmental conditions important
Yes, QS-1H is widely used for tack coat and maintenance on highways and urban roads.
No, QS-1H is a cold-applied emulsion, improving safety and reducing energy costs.
Typically 2–3 months, depending on storage conditions.
Best suited for:
