Open Or Closed Cell Backer Rod

For joints susceptible to the presence of moisture prior to joint sealing such as horizontal joints.

Open or closed cell backer rod.

However closed cell rigidity is merely the result of the gases trapped inside the material. And abuse of these rods does not cause out gassing. Open cell rods are more accepted since they essentially breathe. The hybrid style backer rod is easy to install with the internal open cell structure it can compress easily.

For pricing and availability. The open cell construction eliminates the out gassing and cold flow problem associated with closed cell polyethylene backer rods. Product data sheet. Crack flex concrete sealant m d building products 5 8 in.

Open cell backer rods. Closed cell backer rod sikaflex 10 1 oz. Closed cell when backer rod compared to the closed cell the open cell is much more flexible. The open cell is dependent on its physical and chemical make up in order to attain its rigidity.

Meets all of the requirements of the 1990. Select a denver foam size large enough to absorb the pressure during sealant tooling. Broadway denver co 80216 p. 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.

Standard backer rod suitable for glazing installations window door applications expansion joints curtain wall joints partitions log construction. Backer rod is available in two basic forms. 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. The sealant also has the benefits of a 2 sided cure.

Gray caulk backer rod for gaps and joints. Bond breaker tape is used in joints that are too shallow to install a backer rod. See gibb j f hidden but essential.