Thank you for posting your feedback. We're sorry to see your low star review on DAP DryDex Spackling. DryDex Spackling is a water-based formula, as such, the sole drying mechanism is the evaporation of water. Dry time can be significantly impacted by cool (air and/or application surface), humid application conditions, moisture in the application surfaces and/or by thick (deep) applications of the patch. As indicated on the product package and supporting product literature: "One application is usually sufficient for small repairs. For repairs deeper than 1/8”, apply two or more layers allowing spackling to dry between applications." As depicted in the photograph (attached in your review), it would appear that the thinner edges of the repair have dried (turned white), and the center-most potion of the repair has not yet fully dried (still pink). This would likely signal/indicate a change in application depth/surface conditions in that area. Because you did not indicate the size/depth of the repair, application surfaces, surface preparation, application technique or application conditions, it is difficult to provide a more detailed response in this format. Should you wish to provide more details or to discuss this matter further, please free to contact DAP’s Technical Customer Service Department at 888-327-8477.