Fastflex (formerly branded as Isoflex) extends the service life of concrete by acting as an insulator in isolation joints and expansion joints while acting as a bond-breaker for sealants.
Fastflex is an ideal choice for concrete isolation joint filler applications around footings, foundations, structures, and curved or round bases and posts. Typical projects include walkways, parking decks, curbs and gutters, concrete slabs, swimming pools, and driveways.
This product is a closed-cell polyethylene foam joint filler and is available in continuous lengths in wall thicknesses of 1/2″ and widths from 1” through 6”.