FIBERFLEX® Fiber expansion joint is a joint filler made from proprietary wood fiber blend of treated wood fibers and additives which yields flexible, easy -to-handle boards.

It is used to prevent damage during expansion and contraction of concrete. This product is weather-resistant and meets the requirements of ASTM D 1751. It can be used in driveways, sidewalks, and patios. It is typically used in between concrete slabs and to separate slabs from structures.

From airport runways to interstate highways, sidewalks, garages and driveways. Stronger and lighter than other expansion joint filler compounds. It’s easy to install, resists breakage, cuts cleanly and is easily held in position during pouring.