What is a potential issue when using water-based primer?

Using water-based primer presents a potential issue with adhesion, which is why the correct answer focuses on the possibility that it may not adhere properly. Water-based primers rely on moisture to form a bond with the substrate they are applied to. If the surface is not adequately prepared, or if environmental conditions are not optimal (such as high humidity or low temperatures), the primer may not stick effectively. This lack of adhesion can lead to peeling or flaking once the topcoat is applied, ultimately compromising the durability and appearance of the finished paint job.

It’s important to consider that water-based primers are designed to work with specific types of paint, and while they are generally compatible with many products, there are some limitations based on the formulations of both the primer and the paint. Proper surface preparation and understanding the compatibility of materials are crucial steps to achieve a successful paint application, which is why adhesion issues are a primary concern.