Additives to Produce
High-Performing
Polymer Modified Bitumen

Polymer Modified Bitumen (PMB) blends typically deliver performance beyond standard bitumen binders. Properties and consistency achieved  can be influenced by processing parameters and asphalt additives used during production.  

Sripath additives help improve polymer-bitumen compatibility, dispersion, and stability during mixing, storage, and use.  

These products help producers achieve more workable binders with enhanced durability and long-term performance. 

PGXpand® is a bitumen friendly polymeric additive that delivers outstanding PMB performance comparable to traditional PMBs.  

It is widely used to produce PMBs for hot mix asphalt, in hybrid PMB systems with SBS or crumb rubber, for spray seal applications, and in high-stiffness asphalt mixes. By improving storage stability and reducing or maintaining binder viscosity, PGXpand® helps deliver better performing PMBs for both roofing and roadway paving applications.  

These benefits translate into energy savings, reduced manufacturing costs, and lower greenhouse gas emissions. PGXpand® PMB supports durable pavements with fewer repairs and longer performance life, making it well suited for both new construction and maintenance applications. 

ButaPhalt® is an innovative crosslinking additive designed to improve the effectiveness and stability of the polymer–bitumen reaction during PMB production. Available as a  free-flowing, dust-free powder and as pumpable liquid suspensions, it integrates seamlessly into plant operations.  

By enhancing thermal stability and reaction efficiency, ButaPhalt® supports consistent PMB performance while improving operational productivity. The additive also helps mitigate hydrogen sulfide (H₂S) emissions, contributing to safer working conditions. Together, these benefits allow producers to reliably achieve targeted performance properties with greater control and ease. 

NuMIXER® is a bitumen softener developed to improve the production and handling of polymer modified bitumen (PMB) including formulations containing SBS, crumb rubber modified bitumen (CRMB), and other hybrid polymer blends. By optimizing binder viscosity, NuMIXER® enhances mixing efficiency, improves workability, and simplifies pumping, storage, and transfer throughout the production process.

NuMIXER® helps producers achieve reliable PMB performance while improving plant efficiency and operational control. Its compatibility with a broad range of polymer systems makes it a versatile solution for manufacturers seeking greater flexibility, easier handling, and high-quality PMB production.

PHALANX® is a superior warm mix additive designed to lower production and compaction temperatures while improving overall compactability of polymer modified bitumen (PMB) blends. Compatible with a wide range of polymer systems including SBS, CRMB, and hybrid blends, it enables lower production and handling temperatures while maintaining the performance characteristics required for high-quality PMB.

PHALANX® improves mixing and handling throughout the production process while helping to lower energy consumption and plant emissions. These benefits support more efficient PMB manufacturing, greater operational flexibility, and consistent production of high-performance polymer-modified binders.

Producing high-performance Polymer Modified Bitumen requires careful control of materials, optimization of processing conditions, and managing long-term stability of the PMB binder. All these factors influence manufacturability and field performance. 

Polymer Compatibility and Segregation

Achieving uniform dispersion and long-term compatibility between polymers and bitumen is critical to preventing phase separation and performance loss.

Viscosity Control and Workability

Elevated viscosity can complicate mixing, pumping, and compaction, all of which can increase energy use and reduce plant efficiency.

Production Stability and Storage Performance

PMB must remain stable at high temperatures during storage and transport without degradation or separation.

Quality Management and Consistency

Maintaining consistent binder properties across batches requires tight control, reliable testing, and reduced process variability.

Operational and Performance Tradeoffs

Producers must balance manufacturability with in-service performance, ensuring durability gains without added operational risk.