Backer Rods
Provide support for sealants in gaps—insert these backer rods into gaps and fill in with sealant.
Closed-cell backer rods restrict moisture from being absorbed. Use them with joints that have wide, even spaces.
Bicellular backer rods are more compressible than closed-cell ones. They also restrict moisture from being absorbed. Use them with uneven joints where self-leveling is needed.
Open-cell backer rods are the most compressible and maintain their shape better than bicellular ones. They allow moisture to be absorbed. Although they withstand environments up to 500° F, they shouldn’t be used with hot-pour sealants, which can seep through the large cell size and damage the underlying surface.
| For Max. Joint Wd. | Dia. | Lg., yd. | Minimum Temperature, °F | Maximum Temperature, °F | Color | Each | |
Closed-Cell Polyethylene Foam | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 3/8" | 33 | -45° | 160° | Gray | 000000000 | 000000 |
| 1/4" | 3/8" | 600 | -45° | 160° | Gray | 000000000 | 000000 |
| 1/2" | 5/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
| 1/2" | 5/8" | 515 | -45° | 160° | Gray | 000000000 | 000000 |
| 11/16" | 7/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
| 11/16" | 7/8" | 280 | -45° | 160° | Gray | 000000000 | 000000 |
| 3/4" | 1" | 16 | -45° | 160° | Black | 000000000 | 00000 |
| 3/4" | 1" | 183 | -45° | 160° | Black | 000000000 | 000000 |
| 15/16" | 1 1/4" | 16 | -45° | 160° | Black | 000000000 | 00000 |
| 15/16" | 1 1/4" | 133 | -45° | 160° | Black | 000000000 | 000000 |
| 1 1/8" | 1 1/2" | 140 | -45° | 160° | Black | 000000000 | 000000 |
Bicellular Polyethylene Foam | |||||||
| 1/4" | 3/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
| 1/2" | 5/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
| 11/16" | 7/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
| 7/8" | 1 1/8" | 16 | -45° | 160° | Gray | 000000000 | 00000 |
| 7/8" | 1 1/8" | 167 | -45° | 160° | Gray | 000000000 | 000000 |
| 1 1/8" | 1 1/2" | 140 | -45° | 160° | Gray | 000000000 | 000000 |
| 1 1/2" | 2" | 84 | -45° | 160° | Gray | 000000000 | 000000 |
| 1 7/8" | 2 1/2" | 54 | -45° | 160° | Gray | 000000000 | 000000 |
| 2 1/4" | 3" | 34 | -45° | 160° | Gray | 000000000 | 000000 |
| 3" | 4" | 18 | -45° | 160° | Gray | 000000000 | 000000 |
Open-Cell Polyethylene Foam | |||||||
| 1/2" | 5/8" | 167 | -45° | 500° | Yellow | 000000000 | 00000 |
| 11/16" | 7/8" | 117 | -45° | 500° | Yellow | 000000000 | 000000 |
| 7/8" | 1 1/8" | 100 | -45° | 500° | Yellow | 000000000 | 000000 |