Easy To Operate Asphalt Crack Sealing Machine

1.Unlike small-volume 100-200L crack sealers that require frequent refilling during large-scale highway maintenance, the FND-TG350II is purpose-built for medium-to-large pavement crack repair projects, with its standout 350L large-capacity melting tank as the core highlight. This towed hot-pour crack sealing unit is optimized for long-duration continuous operation on expressways, national highways and busy municipal arterial roads, solving real-world pain points of traditional crack sealing equipment such as frequent material refilling, sealant over-heating carbonization, inflexible hose movement and unsafe feeding height. Every design detail targets high-intensity road maintenance site conditions.

2.First of all, its exclusive indirect thermal-oil heating system paired with special 45° downward-angled combustion chamber geometry delivers unmatched melting performance and material protection. Many competitive crack sealing machines adopt direct-flame heating solution, where fire touches the bottom of melt kettle directly. This will easily burn hot-pour sealant, create carbon residue inside tank and shorten equipment service life. For FND-TG350II, burner flame blows 45 degrees down onto combustion partition wall instead of making direct contact with hot melt kettle. Air inside combustion chamber gets fully heated for complete combustion, greatly raising heat utilization efficiency. Heat transfers to sealant only through circulating thermal oil (80L thermal-oil capacity). Cooperated with auto constant-temperature loop control, it maintains stable heating status no matter whether the tank is full or half-loaded. Even working non-stop for hours on highway repair sites, the hot-pour sealant will never get scorched or coked, which reduces waste of expensive road sealing material and lowers tank interior cleaning frequency. This design is especially valuable for high-volume projects where crews run the machine for whole working shifts.

3.Another one-of-a-kind strength comes from its triple-channel temperature monitoring solution supported by Japan Omron dual digital LCD temperature controller plus imported -type thermocouple. Most competing products only track sealant temperature inside tank, ignoring temperature variation of heat-transfer oil and heating hose. Cold heating hose will cause sealant to solidify halfway during output and block pipeline, bringing extra downtime for maintenance. On FND-TG350II, operators can read and adjust temperature value of thermal oil, hot-pour sealant and 6-meter electric heating hose all on one central control box. Real-time visible temperature data eliminates guesswork for field workers. There is no need for operators to judge material status purely based on experience. Accurate multi-point temperature control guarantees consistent sealant viscosity when pouring into pavement cracks, making sure bonding effect stays stable for every section of repaired crack, which is critical for highway projects with strict tender acceptance standards.

4.The machine adopts yacht-grade trailer rear axle which is rarely seen on ordinary domestic towed crack sealers, achieving an ultra-low loading height specially optimized for heavy-duty daily operation. Large-capacity crack sealers from many other manufacturers have very high filler opening. Operators need to lift heavy bags of hot-pour sealant to shoulder height for feeding, resulting in high labor intensity and potential safety hazard. By redesigning trailer chassis structure with yacht-specific rear axle, our engineering team lowered overall machine height and brought the material feeding inlet down to a user-friendly position. Equipped with anti-splash baffle at feeding port plus full thermal-insulation wrapping for tank body and heating hose, it effectively prevents scald accident for site staff. Two reserved gun storage holes are arranged on front and rear side of hot melt kettle, so operators can place sealing gun conveniently during short work pause, instead of laying hot gun on ground which may damage hose and bring safety risk.

5.The innovative pump electric control integrated on sealing-gun handle brings tangible cost saving for large project. On conventional crack sealing equipment, operators have to walk back to main control cabinet to switch pump on/off. When moving between crack segments, sealant keeps flowing out and creates lots of material waste. FND-TG350II moves pump control button directly onto sealing gun grip. Construction workers can start or stop material output right at crack pouring position instantly. Combined with 6-meter high anti-bend heating hose supporting 270° free rotation, crews can handle both long longitudinal cracks and short transverse cracks along highway lanes without frequently repositioning the whole towed machine. It expands effective working coverage of single machine setup and improves daily linear sealing output.

6.Imported variable-speed electric agitator is configured for the 350L large tank. For big-volume kettle, insufficient stirring will lead to uneven temperature inside tank: partial sealant overheats while other sections remain unmelted. This variable-speed stirring motor runs smoothly with simple structure and low maintenance threshold. It keeps sealant circulating evenly inside full 350L tank throughout melting and construction phase. Operators can adjust stirring speed according to ambient temperature and sealant type.

7.Designed for flexible site-to-site relocation, this towed unit reserves integrated mounting zone for matching crack grooving machine. Road maintenance teams can carry groover together on the trailer frame, instead of towing second separate trailer. One pickup or light truck can pull the complete set of crack repair equipment to finish grooving, cleaning and crack sealing workflow. Built-in LED directional warning device improves visibility when towing along highway shoulder under low-light condition, protecting field crew safety.

8.All above exclusive features make FND-TG350II stand out among generic crack sealing machines. It is not a simple enlarged version of small 200L sealer; every structural upgrade solves pain points raised from real high-volume highway and municipal maintenance projects. Supported by our in-house workshop, further OEM configuration adjustments can be completed based on client local working environment, tender requirement or regional market specification. Whole-machine CE certification, global spare-parts stock and optional overseas engineer on-site commissioning make it suitable for international project tender, FCL full-container bulk wholesale and government road-maintenance procurement.

H2 Heading｜Factory-Direct Supply｜OEM Customization & FCL Bulk Project Solutions

As a professional manufacturer of road-maintenance machinery, we own complete production workshop for crack sealers, grooving machines and matched pavement rehabilitation equipment. We deliver one-stop solutions for global engineering contractors, government procurement agents and equipment distributors, including standard machine supply, OEM custom configuration, FCL full-container bulk wholesale, tender document support, CE certification, whole-machine warranty, global spare-parts inventory and overseas technical service.

Competitive wholesale discount is available for FCL full-container bulk project orders. Our engineering team can adjust machine specifications to satisfy local construction standards and international tender requirements.

Whole-machine warranty covers factory manufacturing defects. Paid overseas engineer on-site service is an option for large overseas projects to finish machine commissioning and local operator training. If you source road repair machines for project tender or long-term distribution cooperation, please share your working-condition requirement, purchasing quantity, special configuration needs and destination port. Our sales engineers will send targeted quotation and solution promptly.

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