Swellable Bar 900 is a new generation high performance acrylic polymer based expanding tape. İt expands up to 900% when in contact with water. İn a totally dry state, will shrink to it’s origional istallation dimension and re-expand on wetting. İt is used in concrete construction for the sealing of construction joints including wall to bas connections, pipe entry systems, sealing of openings and interface sections between existing and new concrete. İt is easily stored in it’s origional moisture-proof wrap in cool, dry conditions away from sunlight.