What is typically a challenge when using moisture-sensitive adhesives?

Moisture-sensitive adhesives are designed to bond when moisture is present; however, in certain contexts, excessive moisture can negatively impact their performance. This can be particularly challenging in construction and various industrial applications where environmental conditions may not be controlled. When used in wet conditions, moisture-sensitive adhesives may experience issues such as incomplete curing, reduced bond strength, or even failure to adhere at all. This crucial characteristic makes it essential to consider moisture levels in the surrounding environment before applying these adhesives to ensure optimal performance and durability of the bond created.

The other options touch on potentially relevant issues, but they do not specifically address the principal challenge associated with moisture-sensitive adhesives in practical application scenarios. For instance, while some adhesives might be challenging to apply or might have a higher cost, these factors do not directly relate to the fundamental properties that affect the adhesives' performance under moisture conditions. Similarly, curing time can vary widely among different adhesives but does not inherently define the challenges posed by moisture sensitivity.