Thank you for posting your feedback. We're sorry to see your low star review on Tremco Vulkem 116. The issue that you describe can result from a number of condition, such as poor storage/handling of the cartridges (exposure to moisture/physical damage), however, the most common repose for this issue results from the application of excessive force when attempting to apply aged/expired material. Should wish to follow-up with us, please feel free to reach out to Tremco Technical Services at 800-321-7906. When calling in please be sure to have the package available (assuming it is still accessible), as we will need the production code printed on the package in order to determine the date of manufacture.