This TECHnote summarises typical sealant types used for different applications in construction. On the selection of sealants, BRANZ Bulletin Issue 601 Sealants for cladding joints notes, “It has been estimated that sealants account for up to 1% of the building cost and the filled joints cause 10% of the cost of subsequent problems. Of the 1%, about a quarter is the material cost. There is little point (and great risk) in skimping on the cost of material to save money”.