Open Or Closed Cell Backer Rod

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.

Open or closed cell backer rod.

However closed cell rigidity is merely the result of the gases trapped inside the material. Bond breaker tape is used in joints that are too shallow to install a backer rod. Broadway denver co 80216 p. The hybrid style backer rod is easy to install with the internal open cell structure it can compress easily.

Select a denver foam size large enough to absorb the pressure during sealant tooling. The open cell is dependent on its physical and chemical make up in order to attain its rigidity. Gray caulk backer rod for gaps and joints. Backer rod is available in two basic forms.

Standard backer rod suitable for glazing installations window door applications expansion joints curtain wall joints partitions log construction. The open cell construction eliminates the out gassing and cold flow problem associated with closed cell polyethylene backer rods. Open cell backer rods may not be ideal for sealants that are susceptible to bubbling of air escaping the backer rod material. For joints susceptible to the presence of moisture prior to joint sealing such as horizontal joints.

Closed cell when backer rod compared to the closed cell the open cell is much more flexible. Meets all of the requirements of the 1990. The sealant also has the benefits of a 2 sided cure. 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.

And abuse of these rods does not cause out gassing. For pricing and availability. See gibb j f hidden but essential. Closed cell backer rod sikaflex 10 1 oz.

Fillpro soft type is a unique bi cellular construction that offers high compressibility but has a closed cell outer skin to resist moisture. Sika 0 75 in x 20 ft backer rod. Open cell rods are more accepted since they essentially breathe.