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.

Gray caulk backer rod for gaps and joints. The sealant also has the benefits of a 2 sided cure. Select a denver foam size large enough to absorb the pressure during sealant tooling. Closed cell backer rod sikaflex 10 1 oz.

Bond breaker tape is used in joints that are too shallow to install a backer rod. Standard backer rod suitable for glazing installations window door applications expansion joints curtain wall joints partitions log construction. Open cell backer rods. Product data sheet.

The open cell construction eliminates the out gassing and cold flow problem associated with closed cell polyethylene backer rods. Fillpro soft type is a unique bi cellular construction that offers high compressibility but has a closed cell outer skin to resist moisture. 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. Open cell backer rods may not be ideal for sealants that are susceptible to bubbling of air escaping the backer rod material. The open cell is dependent on its physical and chemical make up in order to attain its rigidity. 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. Closed cell when backer rod compared to the closed cell the open cell is much more flexible. See gibb j f hidden but essential. Meets all of the requirements of the 1990.

Crack flex concrete sealant m d building products 5 8 in. Sika 0 75 in x 20 ft backer rod. However closed cell rigidity is merely the result of the gases trapped inside the material.