Blueskin membrane
#2
Group Moderator
It probably could but I don't think it's the best product for the job. Roofing membranes are designed to seal around all the nails used to attach shingles. I don't know how well a foundation waterproofing membrane will do in that regard. Also, roof membranes have a non slip surface to make shingling the roof safer.
#3
Member
Blueskin does make several self-adhering roofing underlayment products that advertise the features PD mentions. But if you've already got a bunch of the foundation waterproofer laying around that you want to use, that probably doesn't help you much.