1. Check the sealing strip of concrete mixer for large cracks and fracture. If the seal is broken, it can be repaired with adhesive. In particular, it is easy to repair large cracks by using special adhesive for sealing strip. Of course, if the seal is seriously damaged or aging, it is better to replace it with a new one.

2、司机在使用混凝土搅拌车洗涤剂进行清洗门窗密封胶条之后，涂覆一层高渗透性的保护剂，这样既能防止密封条老化又能极大地提高密封条的密封性。除此之外，密封条的缝隙之间很容易塞满沙尘，从而引发锈蚀。为此，应该用刷子把沙尘等干净。

2. After cleaning the door and window sealing strip with concrete mixer detergent, it is better for the driver to coat a layer of high permeability protective agent, which can not only prevent the aging of the sealing strip, but also greatly improve the sealing performance of the sealing strip. In addition, the gap between the sealing strip is easy to be filled with sand and dust, causing corrosion. Therefore, the dust should be removed with a brush.

3、在更换整个车身时，应在焊缝的搭接部分涂一层密封胶，胶层厚度应约为1mm，并且胶层不得有虚粘、气泡等缺陷。在整个地板下表面和前轮罩下表面应涂3mm-4mm的弹性涂层及防腐涂层。这些措施不仅可以大大增强整车的密封性和减慢车身的锈蚀速度，而且还可以大大提高乘坐舒适性。

3. When replacing the whole car body, a layer of sealant should be applied to the overlapping part of the welding seam, the thickness of the adhesive layer should be about 1 mm, and the adhesive layer should not have defects such as virtual adhesion and bubbles. 3mm-4mm elastic coating and anti-corrosion coating shall be applied on the whole floor surface and front wheel housing surface. These measures can not only greatly enhance the vehicle sealing and slow down the corrosion speed of the body, but also greatly improve the ride comfort.

4、车门与车身的密封是一个比较困难的部位，密封要求比较严，应密封的部分比较长，各密封部位的断面形状不尽相同，而且车门启闭频繁。在混凝土搅拌车上常设置3道,4道密封，安装前支柱及车顶侧横梁部位的四重密封的构造。这种多道密封一般都布置在前门缝里，除具有密封功能外，还有汽车隔音降噪的作用。

4. The sealing between the door and the car body is a difficult part. The sealing requirements are strict. The part that should be sealed is relatively long. The section shape of each sealing part is different, and the door is opened and closed frequently. In the concrete mixer truck, there are usually three or four seals, and four seals are installed at the front pillar and roof side beam. This kind of multi-channel seal is generally arranged in the front door seam. In addition to the sealing function, it also has the function of sound insulation and noise reduction.

5、在车窗玻璃损坏后，司机在换用玻璃时，要检查密封条有无损伤。由于车窗经过修理后往往回复不到原来的形状，因此，这时除了要保证能轻松拉动或升降车窗玻璃外，还要注意车窗玻璃四周的密封性。如果玻璃同玻璃槽口的缝隙不均，橡胶条与玻璃、玻璃槽接触不良，司机可以用手能轻易地将密封条拉脱。

5. After the window glass is damaged, the driver should check whether the sealing strip is damaged when changing the glass. As the window after repair often can not return to the original shape, so at this time, in addition to ensuring that you can easily pull or lift the window, but also pay attention to the sealing around the window. If the gap between the glass and the glass slot is uneven, and the rubber strip has poor contact with the glass and glass slot, the driver can easily pull off the sealing strip by hand.

6、司机在换车顶时，应先在车顶周边压合处涂一层导电密封胶，待焊好后再在流水槽内及接缝处遍涂折边胶，这不但有助于车身的密封，更可防止车身因翻边焊缝处积水而产生早期锈蚀。

6. When changing the car roof, the driver should first apply a layer of conductive sealant at the pressing joint around the car roof, and then apply flanging adhesive in the water channel and joints after welding, which not only helps to seal the car body, but also prevents the car body from early corrosion due to water accumulation at the flanging weld.