Customers in the road marking industry are generally aware that a primer is used when purchasing road marking paint. Whether it's newly painted roads or renovations of existing lines, a primer is indispensable. For example, when installing hot-melt road markings, the adhesion of the markings is a major concern, and the primer plays a crucial role in maintaining and strengthening this adhesion. Below, we'll provide some basic information about primers.

First, the characteristics of asphalt roads:

New asphalt roads contain a large amount of asphalt organic compounds, which are miscible with the binder resins in the road coatings. Meanwhile, the construction temperature is 180-220°C, higher than the melting point of asphalt. During construction, the resin and asphalt (which have already melted) fuse together into a whole, with no clear interface between the ground and the road markings, thus increasing the interaction of forces.

Second, the characteristics of concrete surfaces:

Concrete surfaces are absorbent, meaning they are oil-soluble and have low adhesion to resins. Furthermore, concrete is a rigid surface with minimal deformation. Road coatings, on the other hand, are thermosetting and remain rigid even in cold weather, while general asphalt road primers are non-structural adhesives.

To combine the two, it is required to have good ductility. At the same time, road markings will be subjected to impact forces from various angles during application, which requires concrete topcoat to have good tear resistance. Asphalt roads and building coatings form a whole, which is different from the case where concrete surfaces and building coatings are separate entities. Therefore, concrete surfaces should have a special primer.

Because older asphalt roads have less surface asphalt, the aggregate is more prominent, making their characteristics similar to concrete surfaces. Therefore, concrete undercoating agents or specialized undercoating agents are generally used.

Based on the above points, we can see that undercoating agents are used in conjunction with concrete surface asphalt during road marking construction. For more information on undercoating agents, follow Tiantu Markings or consult our online customer service. Tiantu Markings provides comprehensive services for road marking products, including marking paint, marking equipment, and auxiliary materials. When you need marking paint or undercoating agents, be sure to choose reputable manufacturers and brands to ensure product and service quality. Feel free to contact us anytime; we are online to answer your questions in real time.