Open Or Closed Cell Backer Rod

The open cell construction eliminates the out gassing and cold flow problem associated with closed cell polyethylene backer rods.

Open or closed cell backer rod.

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. Broadway denver co 80216 p. Standard backer rod suitable for glazing installations window door applications expansion joints curtain wall joints partitions log construction. Bond breaker tape is used in joints that are too shallow to install a backer rod.

See gibb j f hidden but essential. Fillpro soft type is a unique bi cellular construction that offers high compressibility but has a closed cell outer skin to resist moisture. Closed cell backer rod sikaflex 10 1 oz. And abuse of these rods does not cause out gassing.

Sika 0 75 in x 20 ft backer rod. Crack flex concrete sealant m d building products 5 8 in. 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. For pricing and availability.

Gray caulk backer rod for gaps and joints. Open cell backer rods. Closed cell when backer rod compared to the closed cell the open cell is much more flexible. However closed cell rigidity is merely the result of the gases trapped inside the material.

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. The open cell is dependent on its physical and chemical make up in order to attain its rigidity. For joints susceptible to the presence of moisture prior to joint sealing such as horizontal joints.

Product data sheet. Open cell backer rods may not be ideal for sealants that are susceptible to bubbling of air escaping the backer rod material. Select a denver foam size large enough to absorb the pressure during sealant tooling.