There is this paper tape they use for joining seams and finishing concave corners when doing drywall. You get like 500 feet for about $3 at the home depot. Amazing material this! It’s paper, but about 2x thickness of copier paper and much stronger. There is a slight bend-line in the middle, and the tape is abou 2" wide. Sticks really well with Elmer’s glue.
Here are the many uses I find for this:
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cover seams between foam sheets. Kept me from buying a new 2" foam, these are $30 per sheet.
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as shims
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as wrapper for any surface which whose texture I am trying to hide such as plywood edge
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as a runner that is applied to the facia board top edge to make the gap between the facia board and foam disappear.
The material holds latex paints well.
Thought I would pass along.
NP.