SPANDEX Plus: Self-expanding Joint Sealing System for Concrete SPANDEX Plus is a cork-based, fibre reinforced material which self-expands upon exposure to weather or green concrete to develop an Interference Pressure Seal within the concrete joint. It is supplied in preform strips to match the designed joint dimensions. Use: SPANDEX Plus provides a combined joint sealer and filler for expansion, contraction and construction joints in concrete. No additional sealers are necessary. It may also be used for structural sealing, as a vibration isolation medium, or as an expansive sealant between dissimilar materials. More information... Corkfill 2: Non-expanding Joint Filler for Concrete Corkfill 3: Self-expanding Joint Filler for Concrete Corkfill is manufactured from pure cork granules, bound together with insoluble polymeric resins and moulded under compression into a flat board. It is supplied in pre-formed strips to match the designed joint dimensions. Use: it is normally used as a filler in conjunction with a pourable or pre-formed sealer. More information... As an industrial material, Embelton also manufacture Cork and Rubber for Gaskets.