- Set foam backer rod in caulk joints quickly, at a consistent depth and without puncturing.
- Adjustable for placing backer rod at any designed depth up to 1″ deep.
- Standard model includes 4 insertion wheels of different widths (1/8″, 1/4″, 3/8″ and 1/2″ wide) and 1 tamping blade.
- Replacement wheels available:
- 640-G02 = 1/8″
- 640-G03 = 1/4″
- 640-G04 = 3/8″
- 640-G05 = 1/2″
- 640-G18 = Tamp Blade
- 640-H15 = Thumb Screw
- 640-G11 = Main frame assembly with washers, pushnuts and 640-H21 1/2″ wheels
- For setting rod deeper up to 2″ use accessory wheel 640-G20.








