Open Or Closed Cell Backer Rod

The open cell is dependent on its physical and chemical make up in order to attain its rigidity.

Open or closed cell backer rod.

Open cell rods are more accepted since they essentially breathe. Meets all of the requirements of the 1990. Closed cell when backer rod compared to the closed cell the open cell is much more flexible. The open cell construction eliminates the out gassing and cold flow problem associated with closed cell polyethylene backer rods.

Since the backer rod has a closed cell exterior it can be installed in horizontal or flat work because it won t wick moisture through itself. Nomaco ocfoam open cell backer rod round flexible continuous lengths of open cell polyurethane foam backer rod for use as a backing material for elastomeric and other cold applied sealants. Bond breaker tape is used in joints that are too shallow to install a backer rod. The hybrid style backer rod is easy to install with the internal open cell structure it can compress easily.

For joints susceptible to the presence of moisture prior to joint sealing such as horizontal joints. Backer rod is available in two basic forms. Broadway denver co 80216 p. Select a denver foam size large enough to absorb the pressure during sealant tooling.

Fillpro soft type is a unique bi cellular construction that offers high compressibility but has a closed cell outer skin to resist moisture. Open cell backer rods. However closed cell rigidity is merely the result of the gases trapped inside the material. Sika 0 75 in x 20 ft backer rod.

For pricing and availability. Crack flex concrete sealant m d building products 5 8 in. Closed cell backer rod sikaflex 10 1 oz. Gray caulk backer rod for gaps and joints.

Open cell backer rods may not be ideal for sealants that are susceptible to bubbling of air escaping the backer rod material. See gibb j f hidden but essential. The sealant also has the benefits of a 2 sided cure.