Backer Rod is a foam material used to fill large checks and gaps between logs. The round shape helps create the ideal joint design.
Water resistant – repels water to protect the joint from damage.
Saves money – fills the joint so you use less caulk
Sealants and chinking do not adhere to the backer rod – only to the log surfaces of the joint – allowing for movement without damaging the sealing material.
Select backer rod based upon your particular needs
1/4 x 100 ($6.62), 3/8 x 100 ($7.79), 1/2 x 100 ($9.74)