ISO/DIS 25345:2026

This International Standard specifies definitions and requirements for sealants used for sealing of joints applied in sanitary areas in the interior of buildings exposed to non-pressurised water. It covers joints in: — bathrooms; — toilets; — showers; — domestic kitchens; — prefabricated elements in sanitary areas (e.g. shower cubicles). Industrial, drinking water, underwater (swimming pools, sewage systems, etc.), food contact applications and sealing of glass-ceramic cooktop panels (stove tops, ceramic hobs) are excluded from the scope. This International Standard does not provide criteria or recommendations for the design of joints and installation of sealants in sanitary applications. This International Standard does not apply to sealants in any of non-paste form, to those used in sanitary joints and to oil-based mastics.