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. Cross-linked polyethylene backer rods can be used with tar, asphalt, cement, and other hot-pour sealants.
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 | |||||||
---|---|---|---|---|---|---|---|
1/2" | 5/8" | 33 | -45° | 160° | Gray | 000000000 | 000000 |
1/2" | 5/8" | 515 | -45° | 160° | Gray | 000000000 | 000000 |
Closed-Cell Cross-Linked Polyethylene Foam | |||||||
1/2" | 5/8" | 515 | Not Rated | 390° | Beige | 000000000 | 000000 |
Bicellular Polyethylene Foam | |||||||
1/2" | 5/8" | 33 | -45° | 160° | Gray | 000000000 | 00000 |
Open-Cell Polyurethane Foam | |||||||
1/2" | 5/8" | 166 | -60° | 500° | Black | 000000000 | 00000 |
Open-Cell Polyethylene Foam | |||||||
1/2" | 5/8" | 167 | -45° | 500° | Yellow | 000000000 | 00000 |