French,
That stuff will work. It will take a little longer to do it's job than 91% because it's only 70%. You'll just have to leave in on a little longer. In the USA we used to buy 99% but it's become increasingly harder to find. I get 91% rubbing alcohol at my local drug store. It' takes a minute of less than the 99% to break down the adhesive. So I'm guessing that the 70% will take an additional minute or so to break down the glue or tape bond.
Regards,
John