- The substrate does not survive contact with moisture or sunlight
- The adhesive fails, usually due to exposure to sunlight, and dries out or crumbles
|Look for it in the insulation aisle|
The substrate is actually metal - it's aluminum - thin enough to stretch a little and to easily conform to almost any shape. And because it is metal, no sunlight - zero sunlight - penetrates the substrate to attack the adhesive. The metal is polished and apparently anodized - it survives years of exposure to sea air without a blemish.
And the acrylic adhesive they put on this tape is some of the most aggressive I have seen. And because it is protected, it is as easy to remove tape that has been in place for years as it is to remove newly-applied tape - the adhesive does not get hard.
Here are a couple of examples where this marvelous stuff is in use on Eolian: