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STANDARD BACKER ROD
CLOSED CELL POLYETHYLENE FOAM


INSTALLATION

TABLE III
ITP ROD SIZE TO JOINT WIDTH
Joint Width
Rod Diameter
Joint Width
Rod Diameter
3/16"
1/4"
1"
1 1/4"
1/4"
3/8"
1 1/8"
1 1/2"
3/8"
1/2"
1 5/8"
2"
1/2"
5/8"
2"
2 1/2"
5/8"
3/4"
2 1/2"
3"
3/4"
7/8"
3 12"
4"
7/8"
1"
For metric joint widths under 25 mm, it is recommended the backer rod diameter be at least 3 mm larger (oversized).
For metric joint widths above 25 mm, it is recommended the backer rod diameter be between 6 mm and 13 mm larger (oversized).

Joint or opening must be clean, dry and free of obstructions. Using Table Ill select proper rod diameter and cut to length or use directly from spool. With a blunt instrument or roller, uniformly install rod at the level recommended by the sealant manufacturer, specifier or architect involved. Generally, the depth of the joint after the backer rod is installed is one half the width. Very large and very small joints vary in terms of this depth to width ratio. (D0 NOT PUNCTURE, STRETCH OR OVERLY COMPRESS)



 

  
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