Hand-push design, easy and flexible, suitable for small construction site, and can finish construction work with the large crack sealing machine or pre-heater; Double insulation, gas heating obtains higher thermal efficiency; Equipped with a temperature indicator to observe the temperature of the material at any time; Material flows out by gravity; with trowelling equipment at the discharge port, operating lever at the handlebar, easy to operate; Gas heating, with gas tank connection device, customers equip gas tank by themseleves.