Explore our factory-direct paving, sealcoating, asphalt recycling, and heavy infrastructure machinery engineered for superior performance and global durability.
In modern civil engineering, pavement infrastructure represents one of the largest capital investments for public municipalities, commercial enterprise developers, and highway authorities globally. Asphalt surfaces are continuously subjected to aggressive environmental factors—including ultraviolet (UV) oxidation, water intrusion, freeze-thaw cycles, automotive chemical spills, and heavy axle loads. Without timely preventative maintenance, micro-cracks rapidly expand into major structural failures, requiring costly mill-and-overlay projects.
Industrial Sealcoating Spray Systems stand at the forefront of modern preventative maintenance. By applying a high-performance protective barrier—composed of polymer-modified asphalt emulsions, coal tar pavement sealers, or bio-based sealants embedded with aggregates—sealcoating spray systems seal micro-voids, restore binder flexibility, and dramatically extend pavement service life by 300% to 500% at a fraction of full rehabilitation costs.
As global infrastructure investments accelerate across North America, Eurasia, Southeast Asia, Africa, and Latin America, road contractors and municipal authorities require robust, high-efficiency spray systems capable of uniform binder dispersion, zero-clog operation, dynamic application rate metering, and seamless integration with heavy-duty truck chassis or towable trailers.
HEM Group was established in 1998 (originally registered as Xi'an Hongda Communications Technology Co., Ltd.) by a visionary cohort of engineering professors from Chang'an University—China's premier institution for highway engineering, vehicle dynamics, and construction machinery design.
As the earliest high-tech enterprise dedicated to the independent R&D and engineering of road construction equipment in China, HEM Group has seamlessly bridged fundamental academic research with heavy industrial manufacturing. In 2006, the company was officially recognized as a certified High-Tech Enterprise by the Shaanxi Provincial Department of Science and Technology.
Achieving uniform film thickness and long-lasting bonding during sealcoating operations requires exact thermal, mechanical, and fluid-dynamic control. Standard utility pumps frequently fail when handling abrasive aggregate mixtures or highly polymer-modified bituminous emulsions. Our engineering team has engineered dedicated, heavy-duty spray architectures designed for zero downtime and maximum fluid coverage.
Equipped with heavy-duty cast iron or steel hydraulic gear pumps, diaphragm pumps, or peristaltic pumping mechanisms. Capable of handling up to 15% sand/aggregate loading without valve abrasion or flow cavitation.
Featuring dual-stage full-sweep hydraulic paddle agitators with variable speed control. Ensures heavy sealcoat slurries and polymers remain in homogenous suspension during transport and operation.
Microprocessor-driven electronic flow controllers adjust spray volume proportionally to vehicle ground speed. Solenoid-activated brass/stainless nozzles deliver razor-sharp fan edge overlaps.
Driven by stringent environmental regulations, carbon reduction targets, and severe labor shortages across global contracting markets, sealcoating spray systems are undergoing a rapid technological evolution:
Integrating cameras and AI edge computing to scan road micro-textures in real-time. Smart spray bars dynamically adjust nozzle pressure and pulse width modulation (PWM) to deposit more sealer on high-porosity distress areas while preserving material on smooth sections.
Transitioning from traditional diesel auxiliary engines to high-density lithium iron phosphate (LiFePO4) battery packs. Electric spray systems operate with near-zero noise, making them ideal for nighttime urban maintenance and strict residential noise-restriction zones.
With coal-tar bans expanding globally due to Polycyclic Aromatic Hydrocarbons (PAHs), spray systems are optimized to handle high-viscosity bio-resins, soy-based rejuvenators, and acrylic polymer emulsions without pump degradation or thermal binding.
IoT-enabled control units upload application rates, square-meter coverage, tank material temperature, and GPS tracks directly to cloud management dashboards, offering contractors complete digital proof of compliance for municipal clients.
Different pavement environments demand customized spray dynamics, tank capacities, and application speeds. HEM Group's engineering solutions cater to diverse commercial and industrial deployment scenarios:
High-speed fog seal and micro-surfacing application via truck-mounted spray bars up to 6 meters wide, ensuring rapid lane opening with minimal traffic disruption.
Dual hand-wand spraying combined with front-mounted spray bars for precise maneuvering around curbs, parking stalls, speed bumps, and pedestrian walkways.
Heavy-duty sand-loaded slurry seal application designed to restore high friction coefficients (skid resistance) and resist jet fuel oxidation.
Compact towable or skid-mounted spray units offering high agility in narrow urban alleys, cul-de-sacs, and residential developments.
HEM Group is not merely an equipment manufacturer; we deliver integrated macro-solutions for civil engineering projects across the world. Our machinery portfolio covers every phase of road construction, surface maintenance, earthmoving, and aggregate extraction:
Heavy wheel loaders, excavators, backhoe loaders, graders, and specialized walking excavators for subgrade preparation, bridge construction, port projects, and land clearing.
Asphalt mixing plants, pavers, asphalt distributors, chip sealers, road milling machines, slurry seal pavers, and sealcoating sprayers for complete pavement preservation.
Mobile primary jaw crushers, cone crushers, roller crushers, and vibrating screening equipment engineered for high-capacity rock processing and recycled asphalt pavement (RAP).
Trusted by road contractors and infrastructure authorities across more than 60 countries.
Find authoritative answers to common engineering, operational, and procurement queries regarding sealcoating spray systems and asphalt preservation equipment.
Select from our full line of mini excavators, bitumen decanters, chip sealers, slurry pavers, and cold recyclers built for global contractors.
HME Machinery
