Foil Safety Backing serves two functions, firstly as a safety backing (if your mirror ever breaks) and secondly it is a protection from water and moisture. It prolongs the life of your mirror. All our mirrors with a foil saftey backing are guaranteed for 10 years. Foil safety backing is compatible with mirror adhesive. It allows the mirror to carry a BS6206 cat C Safety Rating  which is required by building regulations – in all public spaces and commercial premises, high usage areas, kitchens and bathrooms.