How Long is the Paint Interval for Epoxy Zinc-rich Primer?

The anti-corrosion ability of paint is on the one hand affected by the quality of the paint itself, on the other hand it is the construction problem. Due to the different properties of each paint during construction, the drying time is different. When applying the next layer, if the time is not well grasped, it will cause a lot of paint film problems. Today we will discuss how long the paint interval is for the commonly used epoxy zinc rich primer.

1. The inaccurate time interval between epoxy zinc rich primers will cause the following paint film problems.

1.1. Short paint interval: The surface of the epoxy zinc-rich primer is not dry yet, and the water content is high. If the next paint is directly applied, it will cause problems such as blistering of the paint film. The principle is that after the paint is painted, the moisture of the primer cannot evaporate. If it oozes out, it will push out the paint film and blisters.

1.2. Long paint interval: if the epoxy zinc rich primer is finished, if the next paint is not applied for a long time, a lot of dust and stains will accumulate on the surface of the primer, and the air quality is not good. If it is not cleaned, it is easy to cause insufficient adhesion of the paint film and the problem of paint film peeling off.

After the epoxy zinc rich primer is applied, when the next coat of paint is applied is determined by the drying time of the epoxy zinc rich primer. The drying time is affected by the amount of curing agent, air humidity, and temperature.

2. Drying time of epoxy zinc rich primer

We use standard measurement factors to judge: at 25 degrees Celsius and relative humidity below 80%, the theoretical surface drying time of epoxy zinc rich primer is 10 minutes, and the actual drying time is 8 hours. The next paint is applied immediately after the surface is dry.

The recoating interval of this paint is 10 minutes later, and the recoating interval with other types of paint is more than 8 hours.

In the actual construction, the paint interval of epoxy zinc rich primer is mainly affected by the air temperature and humidity. The higher the temperature, the faster drying.

Therefore, before deciding on the next paint construction, it is enough to make sure that the epoxy zinc rich primer is dry to the touch. If you have other questions about the epoxy zinc rich primer, you can consult us and we will provide you with relevant information and construction guidance for free.