High quality, lightweight material used to limit water penetration and reduce abrasion in concrete during expansion. Ideal for use in slabs, walks, drives and isolation joints. Designed to prevent slab-cracking and reduce pushing against existing materials. Replaces outdated asphalt and fiber expansion joints. Tear-off strip is included to accommodate sealant material. Resistant to common chemicals and oils. 1 joint fills a space approximately 15.25 m x 10 cm (50' x 4")