Thank you for posting your feedback. We are sorry to see your low star review on DAP Blacktop Roof Sealant. In order to properly dispense this product, the "inner foil seal" must be punctured. If this foil seal is not properly punctured or the nozzle opening is cut too a very narrow diameter, it will create a too narrow of a restriction for the product to flow (without the use of excessive force), the most common cause for application issues/difficulty. This condition can also occur if the product has thickened due to exceeding its shelf life or if dried material is physically blocking the nozzle (between initial use/re-use attempts). Should you have any additional questions or require assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477. If you would like to verify the age of the material, when calling in please be sure to have the package available, as we will need the production code printed on the package in order to determine the date of manufacture.