Can it be used if freezing temperatures are in the forecast? How long before it cures if high temperature is 40 degrees F?

Thank you for posting your inquiry. As indicated on the product package label and supporting product literature: "Drying Time: Allow to dry 24 hours before driving over patched area. Do not apply if rain is likely within drying period or if temperature is apt to drop below 40F." Because you did not provide any details regarding your attempted repair, it is difficult to provide you with a proper reply or any product usage guidance. At your convenience, please contact DAP’s Technical Customer Service Department at 888-327-8477 so that we can obtain some additional information from you regarding your intended project, and environmental conditions to determine if the repair is possible and/or how best to proceed.