How to Deal with Non-curing Epoxy Paint?

Epoxy paint is a type of paint that is widely used nowadays. There are many types of epoxy paint, which can be used on surfaces of materials such as steel structures and concrete buildings. Epoxy paint includes primer, intermediate coat, and topcoat. Epoxy paint is rarely used outdoors because it is prone to discoloration. Although epoxy paint is commonly used, problems often occur, most of which are related to construction techniques. One major issue is the failure of epoxy paint to cure. Today, we will analyze the reasons and how to deal with it.

Reasons for the failure of epoxy paint to dry:

The epoxy paint film does not cure, first determine whether there is no curing agent or insufficient amount of curing agent added

When purchasing two-component epoxy paint, it usually comes with one barrel of paint and one barrel of curing agent, and the ratio is precise. If the ratio is followed, there will generally be no issues with failure to cure due to the curing agent. However, in actual construction, some contractors may try to save some curing agent and use less of it, using one barrel of curing agent on multiple barrels of paint. This can easily cause slow or non-curing of the paint film.

The failure of epoxy paint to cure may be due to low air temperature

If it is not specifically low-temperature paint, general paint should not be applied at a temperature below 5 degrees Celsius, as low temperatures will prevent the paint from drying. This is something that many people may already know. When choosing paint, it is advisable to consider the use environment. If the temperature is generally low, use low-temperature paint. If not using low-temperature paint, construction should be carried out at normal temperature, and the entire drying period of the paint film should be under normal temperature. The drying time of paint we mention refers to the situation where the temperature is 25 degrees Celsius.

The failure of epoxy paint to cure may be due to high air humidity

High air humidity means excessive moisture in the air, and the moisture in the air attaches to the paint film, causing the epoxy paint to fail to cure or cure slowly. There is often heavy rain in summer and some areas near the sea or rivers. The air humidity requirement for paint application is below 85%, so construction should be avoided in environments with humidity higher than this requirement.

The failure of epoxy paint to cure should be checked to see if it is due to excessive paint film thickness

Excessive paint film thickness is a factor that affects the curing of paint. However, excessive paint film thickness generally only leads to slow curing of the paint film, and it rarely fails to cure.

If epoxy paint fails to cure, you should determine the reason from these aspects and pay attention to them during re-construction. If the epoxy paint film cannot be cured, consider resorting to baking to cure the paint film. However, many sites do not have the conditions for baking, so the only option is to remove the paint film and reapply.