Open Cell Backer Rod
FillPro Open-Cell Backer Rod is a pliable open-cell polyurethane (PU) foam material used for filling irregular joints. Its compatible with virtually all known hot-pour and cold-applied sealant including silicone and rubber asphalt. Compare open- and closed-cell backing rods to choose the best fit for your sealing job.
Get expert tips on durability, moisture resistance, and more. Choose from our selection of backer rods in a wide range of styles and sizes. Same and Next Day Delivery.
The backer rod comes in three main types, closed cell, open cell, and a hybrid that has closed outer cells but open interior cells. Each one of these types of backer rod has its own niche that it thrives in. Denver Foam is a yellow, flexible, open cell polyurethane backer rod for caulking sealants in various construction joints.
It has a wide range of diameters, a 2-sided cure, and can withstand hot pour sealant in pavement maintenance. Open cell backer rods are flexible pieces of foam that allow airflow and compression. They are suitable for applications where movement or fast curing is expected, but not for sealants that can bubble.
Learn more about open cell rods and their differences from closed cell rods. Open cell backer rod is unique; it can easily compress and return to its original state due to unrestricted air movement. This flexibility makes it easily conform to sealing applications and helps limit the depth of the sealant while also adding good sealant airing, which can reduce drying or set up time.
FillPro Open Cell Backer Rod helps sealants assume the optimum hour glass shape to prolong the sealant service life. It is commonly used in applications such as expansion and contraction joints, window glazing, curtain wall partitions, parking decks and bridge construction.
Open (soft) cell backer rod is a soft, gray, pliable non-gassing backup material for construction joints and applications that require sealants. Available in multiple diameters and sold per hundred lineal feet It is an ideal non-gassing backer rod used to control sealant and caulking depth and create a back stop to allow proper sealant tooling and configuration, to allow proper sealant airing and to yield a proper bond break between backup material and sealant.
