This European standard specifies definitions and requirements for elastic sealants used for sealing glazing in building construction applications. It covers glazing joints from 7° horizontal (insert Figure1), main areas of application are: Glass to glass Glass to frame Glass to porous substrates Excluding aquariums, structural bonding/glazing, inner and outer seal to manufacture insulated glazing units, horizontal glazing (below 7°), organic glass (eg polycarbonate, PMMA etc). Compatibility needs to be considered and verified between the sealant and the materials involved according to the methods given in Annex D.