Before applying the double sided tape, the underlying surface should lightly be roughened (e.g. 240 grid paper) and thoroughly cleaned with a suitable solvent like Acetone. After application, the mylar tapes should be covered with white Tesa plastic tape. This prevents the leading edge from peeling off and gives some UV protection to the double sided transfer tape.

If applied properly, these tapes are good for 10 years and more. They properly do not last that long on surfaces stored outside.