What causes epoxy to get tacky after painting?

There are a few reasons why epoxy paint might become tacky after it has been applied:

1. Temperature: Epoxy paint is sensitive to temperature and humidity, so if the temperature is too low or too high, it can cause the paint to become tacky. In general, epoxy paint should be applied at temperatures between 60-90°F (15-32°C) and relative humidity should be below 85%.
2. Mixing ratio: Epoxy paint is a two-part system that typically consists of a resin and a hardener. If the correct mixing ratio is not followed, it can affect the curing process and cause the paint to become tacky.
3. Not enough stirring: Epoxy paint should be thoroughly stirred before and during the application to ensure that the resin and hardener are fully mixed together. Failure to do so can result in improper curing and tackiness.
4. Over application: Over-applying epoxy paint can also cause the paint to become tacky as it can prevent proper curing.
5. Contamination: Epoxy paint should be applied on a clean and dry surface. If the surface contains oil, dust, or other contaminants it can affect the curing process and cause the paint to become tacky.

If the epoxy paint is tacky, the best course of action is to remove the tacky layer and then apply a new coat of epoxy paint, making sure to follow all the appropriate guidelines for mixing, application, and curing. In this case, check the curing time, as some epoxy have longer curing time than others. It’s best to consult with the manufacturer for proper usage and handling of the epoxy paint.

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