Diameter Foam Open Cell Backer Rod is an open cell polyurethane product used as a backer for sealants. It's used in expansion / construction joints, tilt slab construction and caulking.
When sealing joints a backer rod is used to:
• Ensure the correct width to depth ratio is achieved
• Provide a firm backing against which the sealant can be tooled off
• Prevent the sealant from adhering to the bottom of the joint
Why choose an open cell polyurethane backer rod?
An open cell polyurethane rod has the following advantages:
Faster sealant curing: Open cell construction allows moisture or air access to the front and back of the joint at the same time allowing faster, uniform curing
Use in a wide range of joint widths:
The flexibility and round shape allows quick efficient placement into both even and uneven joints. It can be readily compressed allowing one diameter rod to be used in a wide range of joint widths.
Avoids sealant bubbling: Being open cell with no skin, problems with gas release that cause sealant bubbling are avoided.