Backer Rod foam gap filler is extruded closed-cell polyethylene rod developed to be 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 foam gap filler 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
Sizes 5/8″, 1-1/4″, 1-1/2″, 2″ are also available by special order.