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Backing rod is "open" cell and comes in 1/4", 3/8", 1/2", 5/8", 3/4", and 1" diameter rope. In most cases it weighs only 1 to 3 grains, and "exact" cut length is not a factor. I just eye ball it and snip it to length with a scissors. You can buy it in most hardware stores in 10 foot to 100 foot lengths.

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Found it at the nearest hardware store (Menards).
They call it caulk backer rod and 1/2" x 30' is $4.
Good deal! Thanks again.

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Nemo -- Everything 44

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