Does all the old butyl tape need to come off?
Getting ready to leave on vacation tomorrow and noticed the vent in the cabover was leaking. I stuck eternabond tape over the old butyl tape as I was advised it was alright, but it didn't stick proper...
Forum Discussion
Not sure about whether Eternabond can bond to butyl tape - but that shouldn't be an issue as any butyl tape that squeezes out after instal of vent/window etc is usually trimmed off. My experience has been that Eternabond will bond with just about anything except silicone. Make sure the area is dry - prep it in accordance with Eternabond instructions - and make sure you use adequate pressure (metal roller recommended) when installing.
