Many forum members have used Eternabond on their RV's as a preventive measure. Some applied it within weeks or months of purchase. I applied it to my roof the following summer after buying my TT in the fall of 2013. The only thing is I hope you used Eternabond tape and not Flex Seal tape. I have looked at the Flex Seal tape and it is thinner than Eternabond tape. Others who have tried Flex Seal products say it doesn't last. The Flex Seal tape website's "fine print" says it is only intended for temporary repairs and that the tape itself is easily removeable. It also gives a list of things it WILL adhere to, but also has an oblique list of things it WON'T. Flex Seal is made with petroleum products, NOT good for EPDM or TPO roofs.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
The Faster I Go, The Behinder I Get.