Closed Cell Foam Pre-Sealant Backer Rod
Backer Rod is extruded closed-cell polyethylene rod that is used in cracks, checks and gaps before filling them with sealants such as Perma-Chink, Energy Seal and Check Mate 2. Caulk joints should not be more than 3/8” thick and Backer Rod provides a way to fill a deep crevice or gap while maintaining the proper sealant thickness for maximum performance. Backer Rod should also be used in checks over 1/4” wide before applying Check Mate 2.
- Closed cell polyethylene
- Will not absorb water
- Heat and cold stable.
- Should be used to assure proper thickness of sealants including Perma-Chink, Energy Seal and Check Mate 2
Backer Rod Available Sizes
Foam backer rod for narrow gaps and checks in logs.
1 Box = 2 rolls of backer rod, except for the 1” backer rod, which is packaged as one roll per box. We do sell individual rolls of backer rod.
Available Sizes
| Rod Size Dia. | Length/Roll | Price/Roll | Length/Box | Price/Box | Price/ft. |
|---|---|---|---|---|---|
| 1/4″ | 3200′ | $195.99 | 6400′ | $285.99 | $0.21 |
| 3/8″ | 1800′ | $127.99 | 3600′ | $219.99 | $0.25 |
| 1/2″ | 1250′ | $177.99 | 2500′ | $247.99 | $0.50 |
| 5/8″ | 775′ | $104.99 | 1550′ | $200.99 | $0.47 |
| 3/4″ | 550′ | $126.99 | 1100′ | $190.99 | $0.81 |
| 1″ | 550′ | $179.99 | – | – | $1.15 |
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Frequently Asked Questions
Your questions about Backer Rod answered.
Do I need to use backing material?
Yes. For proper adhesion and elasticity of sealants, backing materials should be used. Read more here.
Can I use any foam for backing?
No. The wrong foam, like pink or blue colored foam, will “out-gas” and cause blisters in sealants.
How do I smooth out my sealant?
For a smooth finish, spray the sealant with water and smooth it using a metal spatula. You can learn more about the process of tooling here.
