The blue XPS core of the wedi building board is 100% waterproof and remains fully functional even after possible partial damage. The wedi building boards have great heat insulation properties, save energy costs and provide long-term protection against mold due to its inorganic nature and ability to safely waterproof. wedi building boards can be safely adhered and sealed in assemblies using wedi 610 adhesive sealant. As no other seal is necessary, craftsmen benefit from increased protection accompanied by a shorter surface preparation time before tiling starts.